CVE-2023-53432

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An attacker-controlled FireWire peer can reliably send unfragmented or reassembled datagrams that reach netif_rx() on the success path; the subsequent skb->len use-after-free does not depend on conditions the attacker cannot influence, and UAF bugs are scored AC:L unless a truly uncontrollable race is required.\nPR:N - fwnet_receive_packet accepts TCODE_WRITE_BLOCK_REQUEST payloads from any bus peer with no capability check, credentials, or authentication, and fwnet_receive_broadcast likewise processes GASP packets automatically from the ISO context.\nUI:N - Packet receive and finishing run entirely in FireWire/IRQ softirq context once the firewire-net interface is up; the attacker\u2019s own node supplies the frames and no victim user action (open/mount/click) is required.\nS:U - The use-after-free is confined to kernel sk_buff heap objects under the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free of an sk_buff after netif_rx() handoff allows the freed object to be reclaimed (e.g. via RPS on another CPU) and its contents disclosed through the dangling skb->len read, enabling arbitrary kernel memory read primitives per UAF guidance.\nI:H - sk_buff use-after-free in a general-purpose slab is a classic heap-grooming primitive that can yield attacker-controlled object reuse and control-flow hijacking, so integrity impact is High per UAF scoring guidance.\nA:H - Dereferencing a freed sk_buff can oops/panic the kernel, and an attacker on the bus can repeatedly inject packets to crash the machine at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firewire/net.c"], "versions": [{"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb", "lessThan": "2ea70379e4f4efa95c9daa7f3f9bdd4d40aec927", "status": "affected", "versionType": "git"}, {"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb", "lessThan": "9040adc38cf6bfbb77034d558ac2c52f70d840ac", "status": "affected", "versionType": "git"}, {"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb", "lessThan": "9860921ab4521252dc39bb21b9c936bd09a00982", "status": "affected", "versionType": "git"}, {"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb", "lessThan": "3ff256751a2853e1ffaa36958ff933ccc98c6cb5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firewire/net.c"], "versions": [{"version": "2.6.31", "status": "affected"}, {"version": "0", "lessThan": "2.6.31", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.128", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.47", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.12", "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": "2.6.31", "versionEndExcluding": "5.15.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.1.47"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.4.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.31", "versionEndExcluding": "6.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2ea70379e4f4efa95c9daa7f3f9bdd4d40aec927"}, {"url": "https://git.kernel.org/stable/c/9040adc38cf6bfbb77034d558ac2c52f70d840ac"}, {"url": "https://git.kernel.org/stable/c/9860921ab4521252dc39bb21b9c936bd09a00982"}, {"url": "https://git.kernel.org/stable/c/3ff256751a2853e1ffaa36958ff933ccc98c6cb5"}], "title": "firewire: net: fix use after free in fwnet_finish_incoming_packet()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2023-53432", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-01-14T19:15:23.838324Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T19:23:09.629Z"}}]}}

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{"bugzilla": {"description": "kernel: firewire: net: fix use after free in fwnet_finish_incoming_packet()", "id": "2396503", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396503"}, "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": ["No description is available for this CVE."], "name": "CVE-2023-53432", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53432\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53432\nhttps://lore.kernel.org/linux-cve-announce/2025091857-CVE-2023-53432-bc37@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-09-19T09:35:44.876139+00:00", "updated": "2025-09-19T09:35:44.876202+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}