{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-38612", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-18T19:36:34.944Z", "datePublished": "2024-06-19T13:56:13.415Z", "dateUpdated": "2026-08-05T11:33:11.285Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:33:11.285Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: sr: fix invalid unregister error path\n\nThe error path of seg6_init() is wrong in case CONFIG_IPV6_SEG6_LWTUNNEL\nis not defined. In that case if seg6_hmac_init() fails, the\ngenl_unregister_family() isn't called.\n\nThis issue exist since commit 46738b1317e1 (\"ipv6: sr: add option to control\nlwtunnel support\"), and commit 5559cea2d5aa (\"ipv6: sr: fix possible\nuse-after-free and null-ptr-deref\") replaced unregister_pernet_subsys()\nwith genl_unregister_family() in this error path." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The leaked `seg6_genl_family` is reached through generic netlink sockets (`nlctrl` family enumeration or `SEG6_CMD_*` messages), which require local system access. No remote packet path reaches the stale registration.\nAC:H - The corrupt state only arises if `seg6_hmac_init()` fails during one-shot module/boot init (an ENOMEM or missing-crypto condition an attacker cannot reliably force), and only on the uncommon `CONFIG_IPV6_SEG6_HMAC=y` with `CONFIG_IPV6_SEG6_LWTUNNEL=n` configuration, since distros that enable HMAC normally also enable LWTUNNEL.\nPR:L - Once the family is leaked, any unprivileged local user can dereference the stale `struct genl_family` via `CTRL_CMD_GETFAMILY`/dump on `nlctrl`, which carries no capability check; in the module case even the `GENL_ADMIN_PERM` flag is read out of the freed memory, so the privilege gate itself is unreliable.\nUI:N - Exploitation needs only the attacker's own netlink socket operations after the failed init; no victim action is involved.\nS:U - The dangling family struct, freed pernet data, and any resulting code execution all remain within the kernel's own security authority — no VM, IOMMU, or sandbox boundary is crossed.\nC:H - `CTRL_CMD_GETFAMILY` copies `name`, `version`, `maxattr`, and the op list out of the freed module region into a netlink reply, and `SEG6_CMD_GET_TUNSRC` returns data read through the freed `seg6_pernet_data`, disclosing reclaimed kernel memory to userspace.\nI:H - The use-after-free supplies write primitives — `SEG6_CMD_SET_TUNSRC` writes an attacker-supplied IPv6 address into freed memory and `SEG6_CMD_SETHMAC` mutates a freed rhashtable — while the stale `family->ops[].doit`/`pre_doit` pointers in freed module memory offer control-flow hijack.\nA:H - Dereferencing the freed family struct or the dangling `net->ipv6.seg6_data` produces a use-after-free oops, and netns created after the failure yield a NULL-pointer dereference, either of which panics the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/seg6.c" ], "versions": [ { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "10610575a3ac2a702bf5c57aa931beaf847949c7", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "646cd236c55e2cb5f146fc41bbe4034c4af5b2a4", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "00e6335329f23ac6cf3105931691674e28bc598c", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "1a63730fb315bb1bab97edd69ff58ad45e04bb01", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "e77a3ec7ada84543e75722a1283785a6544de925", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "3398a40dccb88d3a7eef378247a023a78472db66", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "85a70ff1e572160f1eeb096ed48d09a1c9d4d89a", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "c04d6a914e890ccea4a9d11233009a2ee7978bf4", "status": "affected", "versionType": "git" }, { "version": "46738b1317e169b281ad74690276916e24d1be6d", "lessThan": "160e9d2752181fcf18c662e74022d77d3164cd45", "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/ipv6/seg6.c" ], "versions": [ { "version": "4.10", "status": "affected" }, { "version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.316", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.278", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.219", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.161", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.93", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.33", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.12", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.3", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "4.10", "versionEndExcluding": "4.19.316" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.4.278" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.10.219" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.15.161" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.1.93" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.6.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.8.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.9.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/10610575a3ac2a702bf5c57aa931beaf847949c7" }, { "url": "https://git.kernel.org/stable/c/646cd236c55e2cb5f146fc41bbe4034c4af5b2a4" }, { "url": "https://git.kernel.org/stable/c/00e6335329f23ac6cf3105931691674e28bc598c" }, { "url": "https://git.kernel.org/stable/c/1a63730fb315bb1bab97edd69ff58ad45e04bb01" }, { "url": "https://git.kernel.org/stable/c/e77a3ec7ada84543e75722a1283785a6544de925" }, { "url": "https://git.kernel.org/stable/c/3398a40dccb88d3a7eef378247a023a78472db66" }, { "url": "https://git.kernel.org/stable/c/85a70ff1e572160f1eeb096ed48d09a1c9d4d89a" }, { "url": "https://git.kernel.org/stable/c/c04d6a914e890ccea4a9d11233009a2ee7978bf4" }, { "url": "https://git.kernel.org/stable/c/160e9d2752181fcf18c662e74022d77d3164cd45" } ], "title": "ipv6: sr: fix invalid unregister error path", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-476", "lang": "en", "description": "CWE-476 NULL Pointer Dereference" } ] }, { "descriptions": [ { "type": "CWE", "cweId": "CWE-416", "lang": "en", "description": "CWE-416 Use After Free" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "46738b1317e1", "status": "affected", "lessThan": "0610575a3ac", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "46738b1317e1", "status": "affected", "lessThan": "646cd236c55e", "versionType": "custom" } ] }, { 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"versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.15.161", "status": "unaffected", "lessThanOrEqual": "5.16", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.1.93", "status": "unaffected", "lessThanOrEqual": "6.2", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.6.33", "status": "unaffected", "lessThanOrEqual": "6.7", "versionType": "custom" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.8.12", "status": "unaffected", 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