CVE-2023-53600

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53600", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-04T15:40:38.479Z", "datePublished": "2025-10-04T15:44:11.775Z", "dateUpdated": "2026-10-15T21:41:31.545Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:15:04.025Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: fix kasan splat when generating ipv4 pmtu error\n\nIf we try to emit an icmp error in response to a nonliner skb, we get\n\nBUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220\nRead of size 4 at addr ffff88811c50db00 by task iperf3/1691\nCPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309\n[..]\n kasan_report+0x105/0x140\n ip_compute_csum+0x134/0x220\n iptunnel_pmtud_build_icmp+0x554/0x1020\n skb_tunnel_check_pmtu+0x513/0xb80\n vxlan_xmit_one+0x139e/0x2ef0\n vxlan_xmit+0x1867/0x2760\n dev_hard_start_xmit+0x1ee/0x4f0\n br_dev_queue_push_xmit+0x4d1/0x660\n [..]\n\nip_compute_csum() cannot deal with nonlinear skbs, so avoid it.\nAfter this change, splat is gone and iperf3 is no longer stuck."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code runs on the bridge/tunnel forwarding path (`br_dev_queue_push_xmit` \u2192 `vxlan_xmit` \u2192 `skb_tunnel_check_pmtu`), driven entirely by the size, DF flag and layout of an IP packet that a remote host injected into the bridged VXLAN/Geneve overlay; no local access is needed and the leaked checksum is mailed back to the sender.\nAC:L - The attacker controls every trigger condition \u2014 packet size above the tunnel PMTU, the DF bit, and the addresses/protocol that pass the filters in `iptunnel_pmtud_check_icmp()` \u2014 and nonlinearity is the default state for large skbs (NIC page frags, GRO, GSO), so the OOB read fires reliably on the first oversized packet.\nPR:N - No privileges exist on this path: the packet is processed unauthenticated on the bridge forwarding/transmit path with no capability, credential or namespace check between packet reception and `ip_compute_csum()`.\nUI:N - No victim action is required; the kernel autonomously generates the PMTU ICMP error as soon as an oversized DF packet is forwarded to the tunnel port.\nS:U - The out-of-bounds read and its effects stay within the kernel's own security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - Up to ~514 bytes of slab memory adjacent to the skb head are read out of bounds and folded into the ICMP checksum of a packet sent back to the attacker, disclosing adjacent kernel heap state to an off-host observer.\nI:N - The defect is a pure read overrun \u2014 `ip_compute_csum()` only reads, and all writes (`skb_push`, header construction) remain within the region guaranteed by `skb_cow()`, so no kernel memory is modified.\nA:H - The bogus checksum makes the peer drop the ICMP FRAG_NEEDED, black-holing PMTU discovery and hanging tunneled TCP transfers indefinitely (the reported stuck iperf3), and the multi-hundred-byte slab overread oopses the kernel under hardened/debug memory configurations."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/ip_tunnel_core.c"], "versions": [{"version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "5850c391fd7e25662334cb3cbf29a62bcbff1084", "status": "affected", "versionType": "git"}, {"version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "e95808121953410db8c59f0abfde70ac0d34222c", "status": "affected", "versionType": "git"}, {"version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc", "status": "affected", "versionType": "git"}, {"version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "fe6a9f7516735be9fdabab00e47ef7a3403a174d", "status": "affected", "versionType": "git"}, {"version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "6a7ac3d20593865209dceb554d8b3f094c6bd940", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/ip_tunnel_core.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.191", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.127", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.46", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.11", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.10.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.127"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.4.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5850c391fd7e25662334cb3cbf29a62bcbff1084"}, {"url": "https://git.kernel.org/stable/c/e95808121953410db8c59f0abfde70ac0d34222c"}, {"url": "https://git.kernel.org/stable/c/da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc"}, {"url": "https://git.kernel.org/stable/c/fe6a9f7516735be9fdabab00e47ef7a3403a174d"}, {"url": "https://git.kernel.org/stable/c/6a7ac3d20593865209dceb554d8b3f094c6bd940"}], "title": "tunnels: fix kasan splat when generating ipv4 pmtu error", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53600", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-15T21:35:49.694567Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:41:31.545Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53600", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-15T21:35:49.694567Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:35:50.307Z"}}], "cna": {"title": "tunnels: fix kasan splat when generating ipv4 pmtu error", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.1, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code runs on the bridge/tunnel forwarding path (`br_dev_queue_push_xmit` \u2192 `vxlan_xmit` \u2192 `skb_tunnel_check_pmtu`), driven entirely by the size, DF flag and layout of an IP packet that a remote host injected into the bridged VXLAN/Geneve overlay; no local access is needed and the leaked checksum is mailed back to the sender.\nAC:L - The attacker controls every trigger condition \u2014 packet size above the tunnel PMTU, the DF bit, and the addresses/protocol that pass the filters in `iptunnel_pmtud_check_icmp()` \u2014 and nonlinearity is the default state for large skbs (NIC page frags, GRO, GSO), so the OOB read fires reliably on the first oversized packet.\nPR:N - No privileges exist on this path: the packet is processed unauthenticated on the bridge forwarding/transmit path with no capability, credential or namespace check between packet reception and `ip_compute_csum()`.\nUI:N - No victim action is required; the kernel autonomously generates the PMTU ICMP error as soon as an oversized DF packet is forwarded to the tunnel port.\nS:U - The out-of-bounds read and its effects stay within the kernel's own security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - Up to ~514 bytes of slab memory adjacent to the skb head are read out of bounds and folded into the ICMP checksum of a packet sent back to the attacker, disclosing adjacent kernel heap state to an off-host observer.\nI:N - The defect is a pure read overrun \u2014 `ip_compute_csum()` only reads, and all writes (`skb_push`, header construction) remain within the region guaranteed by `skb_cow()`, so no kernel memory is modified.\nA:H - The bogus checksum makes the peer drop the ICMP FRAG_NEEDED, black-holing PMTU discovery and hanging tunneled TCP transfers indefinitely (the reported stuck iperf3), and the multi-hundred-byte slab overread oopses the kernel under hardened/debug memory configurations."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "5850c391fd7e25662334cb3cbf29a62bcbff1084", "versionType": "git"}, {"status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "e95808121953410db8c59f0abfde70ac0d34222c", "versionType": "git"}, {"status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc", "versionType": "git"}, {"status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "fe6a9f7516735be9fdabab00e47ef7a3403a174d", "versionType": "git"}, {"status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "lessThan": "6a7ac3d20593865209dceb554d8b3f094c6bd940", "versionType": "git"}], "programFiles": ["net/ipv4/ip_tunnel_core.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"status": "unaffected", "version": "0", "lessThan": "5.9", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.191", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.127", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.46", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.4.11", "versionType": "semver", "lessThanOrEqual": "6.4.*"}, {"status": "unaffected", "version": "6.5", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv4/ip_tunnel_core.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5850c391fd7e25662334cb3cbf29a62bcbff1084"}, {"url": "https://git.kernel.org/stable/c/e95808121953410db8c59f0abfde70ac0d34222c"}, {"url": "https://git.kernel.org/stable/c/da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc"}, {"url": "https://git.kernel.org/stable/c/fe6a9f7516735be9fdabab00e47ef7a3403a174d"}, {"url": "https://git.kernel.org/stable/c/6a7ac3d20593865209dceb554d8b3f094c6bd940"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: fix kasan splat when generating ipv4 pmtu error\n\nIf we try to emit an icmp error in response to a nonliner skb, we get\n\nBUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220\nRead of size 4 at addr ffff88811c50db00 by task iperf3/1691\nCPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309\n[..]\n kasan_report+0x105/0x140\n ip_compute_csum+0x134/0x220\n iptunnel_pmtud_build_icmp+0x554/0x1020\n skb_tunnel_check_pmtu+0x513/0xb80\n vxlan_xmit_one+0x139e/0x2ef0\n vxlan_xmit+0x1867/0x2760\n dev_hard_start_xmit+0x1ee/0x4f0\n br_dev_queue_push_xmit+0x4d1/0x660\n [..]\n\nip_compute_csum() cannot deal with nonlinear skbs, so avoid it.\nAfter this change, splat is gone and iperf3 is no longer stuck."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.191", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.127", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.46", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.4.11", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.5", "versionStartIncluding": "5.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:15:04.025Z"}}}, "cveMetadata": {"cveId": "CVE-2023-53600", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:41:31.545Z", "dateReserved": "2025-10-04T15:40:38.479Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-10-04T15:44:11.775Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/ip_tunnel_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5850c391fd7e25662334cb3cbf29a62bcbff1084", "status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "versionType": "git"}, {"lessThan": "e95808121953410db8c59f0abfde70ac0d34222c", "status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "versionType": "git"}, {"lessThan": "da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc", "status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "versionType": "git"}, {"lessThan": "fe6a9f7516735be9fdabab00e47ef7a3403a174d", "status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "versionType": "git"}, {"lessThan": "6a7ac3d20593865209dceb554d8b3f094c6bd940", "status": "affected", "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv4/ip_tunnel_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.9"}, {"lessThan": "5.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.191", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.127", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.46", "versionType": "semver"}, {"lessThanOrEqual": "6.4.*", "status": "unaffected", "version": "6.4.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.5", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3E5F49AE-0B0F-4CE5-99C9-AF41E6414918", "versionEndExcluding": "5.10.191", "versionStartIncluding": "5.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "945AF8F7-5328-4A14-B072-A5740192C9E1", "versionEndExcluding": "5.15.127", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D8B8CC90-9492-465C-81D4-10DA3B712286", "versionEndExcluding": "6.1.46", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C36FD9E6-B6D7-4887-8F08-C1F64E139D5C", "versionEndExcluding": "6.4.11", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*", "matchCriteriaId": "0B3E6E4D-E24E-4630-B00C-8C9901C597B0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*", "matchCriteriaId": "E4A01A71-0F09-4DB2-A02F-7EFFBE27C98D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*", "matchCriteriaId": "F5608371-157A-4318-8A2E-4104C3467EA1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*", "matchCriteriaId": "2226A776-DF8C-49E0-A030-0A7853BB018A", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:*", "matchCriteriaId": "6F15C659-DF06-455A-9765-0E6DE920F29A", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: fix kasan splat when generating ipv4 pmtu error\n\nIf we try to emit an icmp error in response to a nonliner skb, we get\n\nBUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220\nRead of size 4 at addr ffff88811c50db00 by task iperf3/1691\nCPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309\n[..]\n kasan_report+0x105/0x140\n ip_compute_csum+0x134/0x220\n iptunnel_pmtud_build_icmp+0x554/0x1020\n skb_tunnel_check_pmtu+0x513/0xb80\n vxlan_xmit_one+0x139e/0x2ef0\n vxlan_xmit+0x1867/0x2760\n dev_hard_start_xmit+0x1ee/0x4f0\n br_dev_queue_push_xmit+0x4d1/0x660\n [..]\n\nip_compute_csum() cannot deal with nonlinear skbs, so avoid it.\nAfter this change, splat is gone and iperf3 is no longer stuck."}], "id": "CVE-2023-53600", "lastModified": "2026-10-15T22:17:43.897", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-53600", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:35:49.694567Z", "version": "2.0.3"}}]}, "published": "2025-10-04T16:15:56.603", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5850c391fd7e25662334cb3cbf29a62bcbff1084"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6a7ac3d20593865209dceb554d8b3f094c6bd940"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e95808121953410db8c59f0abfde70ac0d34222c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fe6a9f7516735be9fdabab00e47ef7a3403a174d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: tunnels: fix kasan splat when generating ipv4 pmtu error", "id": "2401525", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2401525"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntunnels: fix kasan splat when generating ipv4 pmtu error\nIf we try to emit an icmp error in response to a nonliner skb, we get\nBUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220\nRead of size 4 at addr ffff88811c50db00 by task iperf3/1691\nCPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309\n[..]\nkasan_report+0x105/0x140\nip_compute_csum+0x134/0x220\niptunnel_pmtud_build_icmp+0x554/0x1020\nskb_tunnel_check_pmtu+0x513/0xb80\nvxlan_xmit_one+0x139e/0x2ef0\nvxlan_xmit+0x1867/0x2760\ndev_hard_start_xmit+0x1ee/0x4f0\nbr_dev_queue_push_xmit+0x4d1/0x660\n[..]\nip_compute_csum() cannot deal with nonlinear skbs, so avoid it.\nAfter this change, splat is gone and iperf3 is no longer stuck."], "name": "CVE-2023-53600", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53600\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53600\nhttps://lore.kernel.org/linux-cve-announce/2025100430-CVE-2023-53600-69ba@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-10-06T14:40:27.721350+00:00", "updated": "2025-10-06T14:40:27.721406+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}