CVE-2026-72036
CVE CVE-2026-72036EUVD EUVD-2026-58994Published 2026-08-15T05:51:57.000ZLast changed 2026-08-17T05:39:39.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked multiq_dequeue() takes a packet from a band's child with a direct ->dequeue() call after multiq_peek() peeked it. When the child is non-work-conserving the peek stashes the skb in the child's gso_skb, so the direct dequeue returns a different skb and orphans the stash, desyncing the child's qlen/backlog. With a qfq child reached through a peeking parent (e.g. tbf) this re-enters the child on an emptied list and dereferences NULL, panicking the kernel from softirq on ordinary egress. Take the packet through qdisc_dequeue_peeked(), as sch_prio already does and as sch_red and sch_sfb were just fixed to do. The helper is a no-op when the child has no stash, so a work-conserving child is unaffected.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <1b9cc255e8089606b92b2adf504e334573682821; patch: 6.12.97; patch: 6.1.178; patch: 7.2; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <7a5a1582710981ef6637de9f074a60a5b1d63222; 2.6.29; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <54f6b0c843e228d499eb4b6bbb89df68cad9ad5d; patch: 0; patch: 7.1.5; patch: 6.18.40; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <fffeb2ab5eeb823d4c2330571a098f63237c9049; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <5889064919a1e5c0a9469c54895000414fc46944; patch: 5.10.261; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a; patch: 5.15.212; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <86a61e46a1919e8abf4d227c204773dabb24068a; 77be155cba4e163e8bba9fd27222a8b6189ec4f7 <eb1a9637f0bd84b5db8803af65dfb1f44785406f; patch: 6.6.145
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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