CVE record · CVE-2026-90076

net/sched: fq: add overflow bounds to quantum and initial quantum

No CVSS scoreEPSS 0.0021 · 11th percentile

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Linux	Linux	affected afe4fd062416b158a8a8538b23adc1930a9b88dc to before cf398f67d9caa71af3b9fb9319058b22fe6b524e git affected afe4fd062416b158a8a8538b23adc1930a9b88dc to before fd63409b669f9951f1cc6b02486a5254103800d1 git affected afe4fd062416b158a8a8538b23adc1930a9b88dc to before d16dac3925be95ad46e986d4b139c9898b6e227f git affected afe4fd062416b158a8a8538b23adc1930a9b88dc to before f6b3e3848a5fca63438984acd6d9eceac80814c1 git affected afe4fd062416b158a8a8538b23adc1930a9b88dc to before e35acd56f244d94355f9ab237c2ecc8fba5e6f04 git affected afe4fd062416b158a8a8538b23adc1930a9b88dc to before 709f34f7c28dc4dd6c40343d101850f11e172312 git Other versions: unaffected
Linux	Linux	affected 3.12 unaffected before 3.12 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.110 to 6.12., inclusive semver unaffected 6.18.52 to 6.18., inclusive semver unaffected 7.2.6 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-90076
CNA: Linux
Tags: Linux kernel
Published: 17 Sept 2026
Updated: 30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Linux kernel fq packet scheduler in net/sched is affected from 3.12 until fixed. A local user with CAP_NET_ADMIN in a user namespace, using a device with a huge MTU, can trigger an endless loop and a soft lockup. Upgrade to 6.1.191, 6.6.160, 6.12.110, 6.18.52, or a later release in those branches.

Written 12 Nov 2026.

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.0021, the 11th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.