{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38568","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:24.025Z","datePublished":"2025-08-19T17:02:49.278Z","dateUpdated":"2026-08-05T12:02:57.480Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:02:57.480Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: mqprio: fix stack out-of-bounds write in tc entry parsing\n\nTCA_MQPRIO_TC_ENTRY_INDEX is validated using\nNLA_POLICY_MAX(NLA_U32, TC_QOPT_MAX_QUEUE), which allows the value\nTC_QOPT_MAX_QUEUE (16). This leads to a 4-byte out-of-bounds stack\nwrite in the fp[] array, which only has room for 16 elements (0–15).\n\nFix this by changing the policy to allow only up to TC_QOPT_MAX_QUEUE - 1."}],"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 only through an RTM_NEWQDISC rtnetlink message on an AF_NETLINK socket, i.e. a local syscall interface. Per kernel scoring guidance, tc/netlink qdisc configuration paths are Local.\nAC:L - A single crafted netlink message with TCA_MQPRIO_TC_ENTRY_INDEX=16 deterministically triggers the out-of-bounds write; there is no race, no memory-layout guess, and no timing dependency. The only prerequisite is a multiqueue netdev implementing ndo_setup_tc, which is true of essentially every hardware NIC, DSA user port, and mac80211 wlan interface.\nPR:L - Triggering requires CAP_NET_ADMIN in the target network namespace, which per kernel scoring guidance for tc/qdisc paths is rated Low rather than High. Realistic low-privilege holders include containers granted NET_ADMIN over a namespace holding an SR-IOV VF or passed-through NIC, and non-root TSN/network configuration daemons on automotive and industrial systems.\nUI:N - The attacker performs the entire operation themselves via a netlink socket write; no victim action, mount, or file open is needed.\nS:U - The corruption occurs on the kernel stack of the calling task and stays within the kernel's own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The bug corrupts kernel stack memory beyond the fp[] array, damaging adjacent frame state such as saved registers, the canary, or the in-flight netlink attribute iterator. Such kernel memory corruption is treated as leverageable toward information disclosure, so the higher rating is taken.\nI:H - This is an out-of-bounds write into the kernel stack frame at an attacker-selected trigger point, overwriting data the attacker was never permitted to modify. Out-of-bounds writes are rated High for integrity.\nA:H - On stack-protector kernels (the default for distro, Android, and automotive builds) the write lands on the canary region, so returning from mqprio_parse_tc_entries invokes __stack_chk_fail(), which calls panic() and brings the machine down unrecoverably. Even without the stack protector, the corrupted frame state causes a kernel oops."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/sched/sch_mqprio.c"],"versions":[{"version":"f62af20bed2d9e824f51cfc97ff01bc261f40e58","lessThan":"39491e859fd494d0b51adc5c7d54c8a7dcf1d198","status":"affected","versionType":"git"},{"version":"f62af20bed2d9e824f51cfc97ff01bc261f40e58","lessThan":"d00e4125680f7074c4f42ce3c297336f23128e70","status":"affected","versionType":"git"},{"version":"f62af20bed2d9e824f51cfc97ff01bc261f40e58","lessThan":"66fc2ebdd9d5dd6e5a9c7edeace5a61a0ab2cd86","status":"affected","versionType":"git"},{"version":"f62af20bed2d9e824f51cfc97ff01bc261f40e58","lessThan":"f1a9dbcb7d17bf0abb325cdc984957cfabc59693","status":"affected","versionType":"git"},{"version":"f62af20bed2d9e824f51cfc97ff01bc261f40e58","lessThan":"ffd2dc4c6c49ff4f1e5d34e454a6a55608104c17","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_mqprio.c"],"versions":[{"version":"6.4","status":"affected"},{"version":"0","lessThan":"6.4","status":"unaffected","versionType":"semver"},{"version":"6.6.102","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.42","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.10","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16.1","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17","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":"6.4","versionEndExcluding":"6.6.102"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.12.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.15.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.16.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/39491e859fd494d0b51adc5c7d54c8a7dcf1d198"},{"url":"https://git.kernel.org/stable/c/d00e4125680f7074c4f42ce3c297336f23128e70"},{"url":"https://git.kernel.org/stable/c/66fc2ebdd9d5dd6e5a9c7edeace5a61a0ab2cd86"},{"url":"https://git.kernel.org/stable/c/f1a9dbcb7d17bf0abb325cdc984957cfabc59693"},{"url":"https://git.kernel.org/stable/c/ffd2dc4c6c49ff4f1e5d34e454a6a55608104c17"}],"title":"net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2025-38568","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-06-10T20:41:51.423653Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-11T18:44:16.879Z"}}]}}