{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53164", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:25.004Z", "datePublished": "2024-12-27T13:38:43.407Z", "dateUpdated": "2026-08-05T11:44:12.310Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:12.310Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix ordering of qlen adjustment\n\nChanges to sch->q.qlen around qdisc_tree_reduce_backlog() need to happen\n_before_ a call to said function because otherwise it may fail to notify\nparent qdiscs when the child is about to become empty." } ], "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 vulnerable qdisc hierarchy (cake/choke leaf under a classful parent such as DRR/QFQ/HFSC) is built through rtnetlink RTM_NEWQDISC/RTM_NEWTCLASS and triggered by locally injected traffic on a local device, matching the tc/netlink qdisc local vector.\nAC:L - The attacker fully controls every precondition — the qdisc topology, the cake memlimit / choke limit that forces the drop, and the packet injection — making the miscounted qlen and the resulting stale active class deterministic with no race to win.\nPR:L - tc configuration requires only CAP_NET_ADMIN over the target netns, checked via namespace-relative netlink_net_capable(); an unprivileged user obtains it with `unshare -Urn` and uses the always-present `lo` device.\nUI:N - The attacker performs all steps — creating the qdisc tree, sending packets, and deleting the class — with no action by any other user.\nS:U - The corruption and its consequences remain within the kernel's own security authority; this is standard local kernel privilege escalation with no crossing into a hypervisor or IOMMU boundary.\nC:H - The missed qlen_notify() leaves a freed class linked in the parent's active list/rbtree, and the resulting use-after-free lets the attacker reclaim the slab object and read back attacker-shaped kernel memory, yielding arbitrary kernel read.\nI:H - The same use-after-free provides both a hijackable indirect call through cl->qdisc->ops->peek and unlink-style writes via list_del(&cl->alist)/rb_erase(&cl->el_node), giving control-flow hijack and arbitrary write.\nA:H - The stale class causes an immediate use-after-free oops, and even absent full exploitation the permanently non-dequeuing qdisc wedges all transmission on the device, a complete availability loss." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sched/sch_cake.c", "net/sched/sch_choke.c" ], "versions": [ { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "44782565e1e6174c94bddfa72ac7267cd09c1648", "status": "affected", "versionType": "git" }, { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "5e473f462a16f1a34e49ea4289a667d2e4f35b52", "status": "affected", "versionType": "git" }, { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "33db36b3c53d0fda2699ea39ba72bee4de8336e8", "status": "affected", "versionType": "git" }, { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "489422e2befff88a1de52b2acebe7b333bded025", "status": "affected", "versionType": "git" }, { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "97e13434b5da8e91bdf965352fad2141d13d72d3", "status": "affected", "versionType": "git" }, { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "e3e54ad9eff8bdaa70f897e5342e34b76109497f", "status": "affected", "versionType": "git" }, { "version": "959466588aa7f84ccf79ae36a1d89542eaf9aaec", "lessThan": "5eb7de8cd58e73851cd37ff8d0666517d9926948", "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/sched/sch_cake.c", "net/sched/sch_choke.c" ], "versions": [ { "version": "4.14", "status": "affected" }, { "version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.289", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.233", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.176", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.122", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.68", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.7", "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": "4.14", "versionEndExcluding": "5.4.289" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.10.233" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.122" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.68" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/44782565e1e6174c94bddfa72ac7267cd09c1648" }, { "url": "https://git.kernel.org/stable/c/5e473f462a16f1a34e49ea4289a667d2e4f35b52" }, { "url": "https://git.kernel.org/stable/c/33db36b3c53d0fda2699ea39ba72bee4de8336e8" }, { "url": "https://git.kernel.org/stable/c/489422e2befff88a1de52b2acebe7b333bded025" }, { "url": "https://git.kernel.org/stable/c/97e13434b5da8e91bdf965352fad2141d13d72d3" }, { "url": "https://git.kernel.org/stable/c/e3e54ad9eff8bdaa70f897e5342e34b76109497f" }, { "url": "https://git.kernel.org/stable/c/5eb7de8cd58e73851cd37ff8d0666517d9926948" } ], "title": "net: sched: fix ordering of qlen adjustment", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "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": "2025-11-03T20:46:55.582Z" } } ] } }