CVE-2026-72035

net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked

HIGH
8.2
CVSS Score
Published: August 15, 2026 at 05:51 AM UTC
Updated: October 19, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.2
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked When taprio's software path peeks a non-work-conserving child qdisc, the child stashes the peeked skb in its gso_skb; taprio_dequeue_from_txq() then takes the packet with a direct child ->dequeue() call, which ignores that stash, orphans the peeked skb and desyncs the child's qlen/backlog. With a qfq child 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_red and sch_sfb now do. The helper returns the child's stashed skb first and is a no-op when there is none, so a work-conserving child is unaffected and the gated path now consumes the skb whose length was charged to the budget.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.205a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Vendor states this is fixed in 17ab5f76f3899f67e5569722f334591f4b88b17b (fixed)
Vendor states this is fixed in 18d580cb00c55805633bae45e90cf22ed6b8e424 (fixed)
Vendor states this is fixed in 2dcebbd1ad2e180fe7b98bf346ced69a872e11e6 (fixed)
Vendor states this is fixed in 51f8af240aed903e988755af33d7491030b50ae9 (fixed)
Vendor states this is fixed in 6ee5a7665a9080bcb05d703bf981a579436fd05e (fixed)
Vendor states this is fixed in e056e1dfcddca877dd46d704e8ec9860cfc9ec44 (fixed)
Vendor states this is fixed in e2b7ee61989f2d39df6c2cc06f9db1aea69bdb09 (fixed)
Vendor states this is fixed in f60d5c12e0551012cee5c272b0bcbcc78f7bb506 (fixed)
Vendor states this is fixed in 4.20 (unaffected)
Vendor states this is fixed in 5.10.266 (unaffected)
Vendor states this is fixed in 5.15.217 (unaffected)
Vendor states this is fixed in 6.1.184 (unaffected)
Vendor states this is fixed in 6.12.97 (unaffected)
Vendor states this is fixed in 6.18.40 (unaffected)
Vendor states this is fixed in 6.6.145 (unaffected)
Vendor states this is fixed in 7.1.5 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHLinux
Vector?

Quick Info

StatusRECEIVED
CWE
CWE-476

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