{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53432", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.745Z", "datePublished": "2025-09-18T16:04:12.446Z", "dateUpdated": "2026-08-05T09:14:07.109Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:14:07.109Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirewire: net: fix use after free in fwnet_finish_incoming_packet()\n\nThe netif_rx() function frees the skb so we can't dereference it to\nsave the skb->len." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerable path processes IP-over-1394 packets (RFC 2734/3146) from another node on the shared IEEE 1394 bus via fwnet_receive_packet/fwnet_receive_broadcast → fwnet_incoming_packet → fwnet_finish_incoming_packet, matching this CNA’s Adjacent shared-physical-segment model for FireWire (CVE-2024-50113).\nAC:L - 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’s 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" } } ] } }