{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56603", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.012Z", "datePublished": "2024-12-27T14:51:08.923Z", "dateUpdated": "2026-08-05T11:45:23.876Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:23.876Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: af_can: do not leave a dangling sk pointer in can_create()\n\nOn error can_create() frees the allocated sk object, but sock_init_data()\nhas already attached it to the provided sock object. This will leave a\ndangling sk pointer in the sock object and may cause use-after-free later." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The defect lives in the `socket(AF_CAN, SOCK_RAW, CAN_RAW)` creation path, reached only through a local syscall via `__sock_create()`; no CAN-bus frame or network data reaches `can_create()`. Consistent with the Bluetooth and af_packet siblings in the same series, which were also scored AV:L because the flaw is in socket setup rather than frame processing.\nAC:L - The only failing `->init` is `raw_init()`'s `alloc_percpu(struct uniqframe)` returning `-ENOMEM`, and an unprivileged local attacker can drive the percpu allocator into failure by spraying percpu-consuming objects (including CAN raw sockets themselves) before retrying `socket()` in a tight loop. This is the same attacker-induced-ENOMEM shape as the af_packet sibling CVE-2024-56606, which was scored AC:L.\nPR:L - `can_create()` performs no `capable()` check at all — unlike af_packet there is no `CAP_NET_RAW` gate — and there is no `net_eq(net, &init_net)` restriction, so any unprivileged local user, including inside an unprivileged user namespace, can reach it. Where `CONFIG_CAN` is modular, `MODULE_ALIAS_NETPROTO(PF_CAN)` lets the unprivileged `socket()` call autoload the module itself.\nUI:N - The attacker performs the entire sequence — memory pressure plus repeated `socket()` calls — from its own process. No victim action, mount, or file open is involved.\nS:U - The freed `struct raw_sock`/`struct sock` and the stale `sock->sk` reference both live entirely within the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - Per the use-after-free rubric, the stale `sock->sk` pointing at a freed `raw_sock` in the general kmalloc caches lets an attacker reclaim the slab and read back attacker-shaped or leftover kernel data; the demonstrated consumer for this exact bug class (CVE-2024-40954) is a KASAN-confirmed slab-use-after-free *read* of the freed sock via `__sock_gen_cookie()`.\nI:H - The same dangling reference permits heap spraying of the reclaimed slot, giving control over function-pointer-bearing fields of `struct sock` (`sk_prot`, `sk_destruct`, `sk_wq`) and therefore a control-flow-hijack primitive rather than mere data corruption.\nA:H - Any dereference of the freed `sock->sk` before `iput()` faults or corrupts kernel state, producing an oops or panic; the rubric treats all use-after-free conditions as high availability impact even when only partially exploited." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/can/af_can.c" ], "versions": [ { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "884ae8bcee749be43a071d6ed2d89058dbd2425c", "status": "affected", "versionType": "git" }, { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "ce39b5576785bb3e66591145aad03d66bc3e778d", "status": "affected", "versionType": "git" }, { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "1fe625f12d090d69f3f084990c7e4c1ff94bfe5f", "status": "affected", "versionType": "git" }, { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "5947c9ac08f0771ea8ed64186b0d52e9029cb6c0", "status": "affected", "versionType": "git" }, { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "db207d19adbac96058685f6257720906ad41d215", "status": "affected", "versionType": "git" }, { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "8df832e6b945e1ba61467d7f1c9305e314ae92fe", "status": "affected", "versionType": "git" }, { "version": "0d66548a10cbbe0ef256852d63d30603f0f73f9b", "lessThan": "811a7ca7320c062e15d0f5b171fe6ad8592d1434", "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/can/af_can.c" ], "versions": [ { "version": "2.6.25", "status": "affected" }, { "version": "0", "lessThan": "2.6.25", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "2.6.25", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.6.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/884ae8bcee749be43a071d6ed2d89058dbd2425c" }, { "url": "https://git.kernel.org/stable/c/ce39b5576785bb3e66591145aad03d66bc3e778d" }, { "url": "https://git.kernel.org/stable/c/1fe625f12d090d69f3f084990c7e4c1ff94bfe5f" }, { "url": "https://git.kernel.org/stable/c/5947c9ac08f0771ea8ed64186b0d52e9029cb6c0" }, { "url": "https://git.kernel.org/stable/c/db207d19adbac96058685f6257720906ad41d215" }, { "url": "https://git.kernel.org/stable/c/8df832e6b945e1ba61467d7f1c9305e314ae92fe" }, { "url": "https://git.kernel.org/stable/c/811a7ca7320c062e15d0f5b171fe6ad8592d1434" } ], "title": "net: af_can: do not leave a dangling sk pointer in can_create()", "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-2024-56603", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-11T15:42:16.822268Z" } } } ], "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": "2025-02-11T15:45:23.668Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:50:46.640Z" } } ] } }