{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56606", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.013Z", "datePublished": "2024-12-27T14:51:11.327Z", "dateUpdated": "2026-08-05T11:45:27.108Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:27.108Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_packet: avoid erroring out after sock_init_data() in packet_create()\n\nAfter sock_init_data() the allocated sk object is attached to the provided\nsock object. On error, packet_create() frees the sk object leaving the\ndangling pointer in the sock object on return. Some other code may try\nto use this pointer and cause use-after-free." } ], "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 vulnerability is reached purely through the local `socket(AF_PACKET, ...)` syscall path (`__sys_socket` → `__sock_create` → `packet_create`); no network packet or remote peer is involved in triggering it.\nAC:L - The attacker controls both preconditions — they can exhaust percpu/slab memory themselves (mass socket and BPF-map allocation, netns churn) and retry the cheap `socket()` call in an unbounded loop until `alloc_percpu()` fails, and can heap-spray the generic kmalloc cache to reclaim the freed `packet_sock`.\nPR:L - The only gate is `ns_capable(net->user_ns, CAP_NET_RAW)` at af_packet.c:3394, which any unprivileged user satisfies inside a user+network namespace (`unshare -Urn`), and which containers hold by default.\nUI:N - The attacker triggers the entire sequence from their own process via repeated `socket()` calls; no action by any other user or administrator is required.\nS:U - The dangling pointer, the freed object, and the resulting corruption are all within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The use-after-free reads freed slab memory (`atomic64_read(&sk->sk_cookie)` in `__sock_gen_cookie()`), and since `packet_sock` comes from a generic kmalloc cache the attacker can reclaim the object with sprayed content, turning this into a controllable kernel memory disclosure primitive.\nI:H - `__sock_gen_cookie()` performs an `atomic64_cmpxchg()` on the freed object — an 8-byte write into attacker-reclaimed slab memory at a controlled offset, which is a classic stepping stone to control-flow hijack and privilege escalation.\nA:H - Dereferencing the dangling `sock->sk` after `sk_free()` corrupts freed slab memory and reliably produces a KASAN splat, oops, or panic, as shown in the reference report for this bug class." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/packet/af_packet.c" ], "versions": [ { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "71b22837a5e55ac27d6a14b9cdf2326587405c4f", "status": "affected", "versionType": "git" }, { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "1dc1e1db927056cb323296e2294a855cd003dfe7", "status": "affected", "versionType": "git" }, { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "132e615bb1d7cdec2d3cfbdec2efa630e923fd21", "status": "affected", "versionType": "git" }, { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "a6cf750b737374454a4e03a5ed449a3eb0c96414", "status": "affected", "versionType": "git" }, { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "157f08db94123e2ba56877dd0ac88908b13a5dd0", "status": "affected", "versionType": "git" }, { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "fd09880b16d33aa5a7420578e01cd79148fa9829", "status": "affected", "versionType": "git" }, { "version": "b013840810c221f2b0cf641d01531526052dc1fb", "lessThan": "46f2a11cb82b657fd15bab1c47821b635e03838b", "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/packet/af_packet.c" ], "versions": [ { "version": "3.14", "status": "affected" }, { "version": "0", "lessThan": "3.14", "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": "3.14", "versionEndExcluding": "5.4.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.10.231" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.6.66" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.12.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/71b22837a5e55ac27d6a14b9cdf2326587405c4f" }, { "url": "https://git.kernel.org/stable/c/1dc1e1db927056cb323296e2294a855cd003dfe7" }, { "url": "https://git.kernel.org/stable/c/132e615bb1d7cdec2d3cfbdec2efa630e923fd21" }, { "url": "https://git.kernel.org/stable/c/a6cf750b737374454a4e03a5ed449a3eb0c96414" }, { "url": "https://git.kernel.org/stable/c/157f08db94123e2ba56877dd0ac88908b13a5dd0" }, { "url": "https://git.kernel.org/stable/c/fd09880b16d33aa5a7420578e01cd79148fa9829" }, { "url": "https://git.kernel.org/stable/c/46f2a11cb82b657fd15bab1c47821b635e03838b" } ], "title": "af_packet: avoid erroring out after sock_init_data() in packet_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-2024-56606", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-11T15:42:04.007778Z" } } } ], "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": "2025-02-11T15:45:22.662Z" } }, { "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": "2025-11-03T20:50:53.934Z" } } ] } }