{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81002", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.812Z", "datePublished": "2026-09-11T19:42:55.506Z", "dateUpdated": "2026-09-13T06:29:04.973Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-13T06:29:04.973Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxdp: fix zero-copy frame layout\n\nxdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page\nand advertises PAGE_SIZE as its frame size. It allows the copied frame\nto occupy the page tail needed by skb_shared_info and records zero\nheadroom even when metadata separates the frame header from packet data.\nAn AF_XDP zero-copy packet redirected through cpumap can therefore make\nthe skb overlap skb_shared_info or place it beyond the allocated page.\n\nLimit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the\nmetadata length in frame headroom. Redirect callers already handle a\nNULL conversion result.\n\nBUG: KASAN: slab-out-of-bounds in skb_gro_receive\nWrite of size 4 at addr ffff88800cf37004 by task cpumap/1/map:1/146\nCall Trace:\n skb_gro_receive (net/core/gro.c:174)\n udp_gro_receive (net/ipv4/udp_offload.c:812)\n inet_gro_receive (net/ipv4/af_inet.c:1539)\n dev_gro_receive (net/core/gro.c:515)\n gro_receive_skb (net/core/gro.c:633)\n cpu_map_kthread_run (kernel/bpf/cpumap.c:395)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:164)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:255)\nKernel panic - not syncing: KASAN: panic_on_warn set ..."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Received AF_XDP zero-copy packets reach xdp_convert_zc_to_xdp_frame() on XDP_REDIRECT into cpumap or a veth. On an internet-facing NIC with that hybrid XDP/AF_XDP setup, unauthenticated remote frames drive the cloned page into skb/GRO; AF_XDP bind is a victim-side prerequisite, not a local-only syscall bug.\nAC:L - The sender chooses packet length, so a 4K UMEM/jumbo frame makes the clone occupy the skb_shared_info tail, and normal cpumap/veth metadata (bpf_xdp_adjust_meta) misplaces sinfo past the page. Either layout is attacker-reproducible with no race or uninfluenced memory-layout dependency.\nPR:N - The remote sender needs no account or capability. CAP_NET_RAW, CAP_NET_ADMIN, and CAP_BPF are required only by the victim process that binds the XSK queue and loads the XDP redirect program, matching other AF_XDP RX-path kernel scores.\nUI:N - After the interface is configured, inbound packets are converted and passed to GRO automatically in NAPI or the cpumap kthread; no victim mount, click, or other per-packet action is required.\nS:U - The out-of-bounds skb_shared_info write corrupts host kernel heap/page memory in the same kernel authority. It is ordinary kernel memory corruption, not a VM, IOMMU, or sandbox boundary crossing.\nC:H - skb_shared_info is placed past the order-0 page or overlapped with the copied frame, so GRO and build_skb write into adjacent objects that hold kernel pointers; that corruption can be turned into an arbitrary kernel read, so confidentiality is High.\nI:H - KASAN records a 4-byte out-of-bounds write in skb_gro_receive while building the skb around the mis-sized ZC clone. An OOB write of skb_shared_info (including pointer fields) is an arbitrary-write/control-flow primitive, so integrity is High.\nA:H - The same GRO path panics under KASAN and oopses without it when skb_shared_info is written off the allocated page, so a remote packet can crash the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/xdp.c"], "versions": [{"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "lessThan": "444216dacdbebd3e52d5e704facafbb230da09e9", "status": "affected", "versionType": "git"}, {"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "lessThan": "15d1f3c0dbe7a740f779337deb39f23cd8d002c8", "status": "affected", "versionType": "git"}, {"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "lessThan": "68d7cc5512238693670fc19c7a615df631e10edf", "status": "affected", "versionType": "git"}, {"version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "lessThan": "71283aaa6c65b3cec84caf1dc78560985737641f", "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/core/xdp.c"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "4.20", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/444216dacdbebd3e52d5e704facafbb230da09e9"}, {"url": "https://git.kernel.org/stable/c/15d1f3c0dbe7a740f779337deb39f23cd8d002c8"}, {"url": "https://git.kernel.org/stable/c/68d7cc5512238693670fc19c7a615df631e10edf"}, {"url": "https://git.kernel.org/stable/c/71283aaa6c65b3cec84caf1dc78560985737641f"}], "title": "xdp: fix zero-copy frame layout", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/core/xdp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "444216dacdbebd3e52d5e704facafbb230da09e9", "status": "affected", "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "versionType": "git"}, {"lessThan": "15d1f3c0dbe7a740f779337deb39f23cd8d002c8", "status": "affected", "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "versionType": "git"}, {"lessThan": "68d7cc5512238693670fc19c7a615df631e10edf", "status": "affected", "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "versionType": "git"}, {"lessThan": "71283aaa6c65b3cec84caf1dc78560985737641f", "status": "affected", "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/xdp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.20"}, {"lessThan": "4.20", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxdp: fix zero-copy frame layout\n\nxdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page\nand advertises PAGE_SIZE as its frame size. It allows the copied frame\nto occupy the page tail needed by skb_shared_info and records zero\nheadroom even when metadata separates the frame header from packet data.\nAn AF_XDP zero-copy packet redirected through cpumap can therefore make\nthe skb overlap skb_shared_info or place it beyond the allocated page.\n\nLimit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the\nmetadata length in frame headroom. Redirect callers already handle a\nNULL conversion result.\n\nBUG: KASAN: slab-out-of-bounds in skb_gro_receive\nWrite of size 4 at addr ffff88800cf37004 by task cpumap/1/map:1/146\nCall Trace:\n skb_gro_receive (net/core/gro.c:174)\n udp_gro_receive (net/ipv4/udp_offload.c:812)\n inet_gro_receive (net/ipv4/af_inet.c:1539)\n dev_gro_receive (net/core/gro.c:515)\n gro_receive_skb (net/core/gro.c:633)\n cpu_map_kthread_run (kernel/bpf/cpumap.c:395)\n kthread (kernel/kthread.c:436)\n ret_from_fork (arch/x86/kernel/process.c:164)\n ret_from_fork_asm (arch/x86/entry/entry_64.S:255)\nKernel panic - not syncing: KASAN: panic_on_warn set ..."}], "id": "CVE-2026-81002", "lastModified": "2026-09-13T07:17:06.883", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:08.483", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15d1f3c0dbe7a740f779337deb39f23cd8d002c8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/444216dacdbebd3e52d5e704facafbb230da09e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/68d7cc5512238693670fc19c7a615df631e10edf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/71283aaa6c65b3cec84caf1dc78560985737641f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Denial of Service in XDP due to incorrect zero-copy frame layout", "id": "2532133", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532133"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's XDP (eXpress Data Path) component. Incorrect handling of zero-copy frame layout in the `xdp_convert_zc_to_xdp_frame()` function can allow an AF_XDP zero-copy packet, when redirected through `cpumap`, to cause a memory corruption. This can lead to a slab-out-of-bounds error, resulting in a kernel panic and a Denial of Service (DoS) for the system."], "name": "CVE-2026-81002", "public_date": "2026-09-11T19:42:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-81002\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-81002\nhttps://git.kernel.org/stable/c/15d1f3c0dbe7a740f779337deb39f23cd8d002c8\nhttps://git.kernel.org/stable/c/444216dacdbebd3e52d5e704facafbb230da09e9\nhttps://git.kernel.org/stable/c/68d7cc5512238693670fc19c7a615df631e10edf\nhttps://git.kernel.org/stable/c/71283aaa6c65b3cec84caf1dc78560985737641f"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[b0d1beeff2a97a0cf1965ea8f1d13b8973f22582,444216dacdbebd3e52d5e704facafbb230da09e9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[b0d1beeff2a97a0cf1965ea8f1d13b8973f22582,15d1f3c0dbe7a740f779337deb39f23cd8d002c8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[b0d1beeff2a97a0cf1965ea8f1d13b8973f22582,68d7cc5512238693670fc19c7a615df631e10edf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[b0d1beeff2a97a0cf1965ea8f1d13b8973f22582,71283aaa6c65b3cec84caf1dc78560985737641f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.20"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.20)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T04:45:07.541021+00:00", "updated": "2026-09-12T04:45:07.541063+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}