{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-26734", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.165Z", "datePublished": "2024-04-03T17:00:21.162Z", "dateUpdated": "2026-08-05T11:26:53.941Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:26:53.941Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndevlink: fix possible use-after-free and memory leaks in devlink_init()\n\nThe pernet operations structure for the subsystem must be registered\nbefore registering the generic netlink family.\n\nMake an unregister in case of unsuccessful registration." } ], "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 resulting dangling `struct net` pointer is only reached through the devlink generic-netlink family from a local AF_NETLINK socket (`devlinks_xa_find_get()` → `devlink_net()`), with no remote protocol involvement. Netlink-reachable kernel state is scored Local.\nAC:H - The vulnerable state only exists if a registration inside the boot-time `subsys_initcall` `devlink_init()` fails, which depends on early-boot allocation conditions entirely outside attacker influence — and in practice `register_pernet_subsys()` on `.pre_exit`-only ops and `register_netdevice_notifier()` on an always-`NOTIFY_OK` handler cannot fail at all.\nPR:L - Once the pernet `pre_exit` hook is missing, the stale `devlink->_net` is dereferenced from `DEVLINK_CMD_*_GET`/dump handlers that carry no `GENL_ADMIN_PERM`, so any unprivileged local user with a netlink socket can touch the freed pointer.\nUI:N - Triggering the devlink netlink query that dereferences the dangling namespace pointer requires no action by any other user or administrator.\nS:U - The corruption and its consequences stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - A use-after-free on a freed `struct net` lets an attacker reclaim the slab with controlled data and read back kernel memory through devlink's namespace-filtered dump paths.\nI:H - The same use-after-free permits heap spraying of the freed `struct net`, yielding attacker-influenced writes through the reference-counting and reload paths that operate on it, which is exploitable toward control-flow hijack.\nA:H - Dereferencing a freed network namespace reliably produces an oops or panic, and the unbalanced registrations additionally leak kernel memory." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/devlink/core.c" ], "versions": [ { "version": "687125b5799cd5120437fa455cfccbe8537916ff", "lessThan": "919092bd5482b7070ae66d1daef73b600738f3a2", "status": "affected", "versionType": "git" }, { "version": "687125b5799cd5120437fa455cfccbe8537916ff", "lessThan": "e91d3561e28d7665f4f837880501dc8755f635a9", "status": "affected", "versionType": "git" }, { "version": "687125b5799cd5120437fa455cfccbe8537916ff", "lessThan": "def689fc26b9a9622d2e2cb0c4933dd3b1c8071c", "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/devlink/core.c" ], "versions": [ { "version": "6.3", "status": "affected" }, { "version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.19", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.7", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "6.3", "versionEndExcluding": "6.6.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.7.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/919092bd5482b7070ae66d1daef73b600738f3a2" }, { "url": "https://git.kernel.org/stable/c/e91d3561e28d7665f4f837880501dc8755f635a9" }, { "url": "https://git.kernel.org/stable/c/def689fc26b9a9622d2e2cb0c4933dd3b1c8071c" } ], "title": "devlink: fix possible use-after-free and memory leaks in devlink_init()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:13.249Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/919092bd5482b7070ae66d1daef73b600738f3a2", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/e91d3561e28d7665f4f837880501dc8755f635a9", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/def689fc26b9a9622d2e2cb0c4933dd3b1c8071c", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26734", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:51:57.238703Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:19.585Z" } } ] } }