CVE-2026-72036
net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < 3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < eb1a9637f0bd84b5db8803af65dfb1f44785406f
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < 7a5a1582710981ef6637de9f074a60a5b1d63222
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < 86a61e46a1919e8abf4d227c204773dabb24068a
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < 1b9cc255e8089606b92b2adf504e334573682821
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < 5889064919a1e5c0a9469c54895000414fc46944
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < fffeb2ab5eeb823d4c2330571a098f63237c9049
- affected 77be155cba4e163e8bba9fd27222a8b6189ec4f7 – < 54f6b0c843e228d499eb4b6bbb89df68cad9ad5d
- affected 2.6.29
- unaffected < 2.6.29
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a (opens in a new tab)
- https://git.kernel.org/stable/c/eb1a9637f0bd84b5db8803af65dfb1f44785406f (opens in a new tab)
- https://git.kernel.org/stable/c/7a5a1582710981ef6637de9f074a60a5b1d63222 (opens in a new tab)
- https://git.kernel.org/stable/c/86a61e46a1919e8abf4d227c204773dabb24068a (opens in a new tab)
- https://git.kernel.org/stable/c/1b9cc255e8089606b92b2adf504e334573682821 (opens in a new tab)
- https://git.kernel.org/stable/c/5889064919a1e5c0a9469c54895000414fc46944 (opens in a new tab)
- https://git.kernel.org/stable/c/fffeb2ab5eeb823d4c2330571a098f63237c9049 (opens in a new tab)
- https://git.kernel.org/stable/c/54f6b0c843e228d499eb4b6bbb89df68cad9ad5d (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-58994 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-72036)Record last updated .