CVE record · CVE-2026-93100

fs/resctrl: Prevent use-after-free in rdtgroup_kn_put()

No CVSS scoreEPSS 0.0022 · 11th percentile

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:11 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 b8511ccc75c033f6d54188ea4df7bf1e85778740 to before 906b3044dbf7c38cc411f7cf457c811363161e3b git affected b8511ccc75c033f6d54188ea4df7bf1e85778740 to before 971b40e3ca1279ca4917889e0195d33b66d071a4 git affected b8511ccc75c033f6d54188ea4df7bf1e85778740 to before 828ff461c136b95d13b8d712c0a7a06a640e313a git affected b8511ccc75c033f6d54188ea4df7bf1e85778740 to before ae69f936e8ffed553d899ba4c02f8a7461a89e54 git affected b8511ccc75c033f6d54188ea4df7bf1e85778740 to before 4c593c62c1499665baebbb41b70e2c9b7e947b86 git affected b8511ccc75c033f6d54188ea4df7bf1e85778740 to before f5bcf539484d2d604c2f2330e09487ea090b21c7 git affected d20edc0bca5577bab38acb5b190619c922ddebf8 git affected 1b006f8cbde9f3dabdfafe2ff7aa9f831ed5b625 git affected 40300f986e47dbc8f1d02e5080385f5cf9f85f70 git affected b5a4949897ebada8132d54c93208989482503103 git affected 4.14.170 to before 4.15 semver affected 4.19.102 to before 4.20 semver and 2 more Other versions: unaffected
Linux	Linux	affected 5.6 unaffected before 5.6 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.114 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-2026-93100
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 fs/resctrl code, affected from 5.6 until fixed, has a race in rdtgroup_kn_put() that can cause a use-after-free of a resctrl group structure, which may then be freed twice. The source gives few details on what an attacker needs to trigger it. Upgrade to 6.1.191, 6.6.160, 6.12.114, or 6.18.52 or later in those series.

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 0.0022, 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.