CVE record · CVE-2026-98959

btrfs: fix xattr replace when multiple xattrs are packed in the same item

CVSS 9.8 CriticalCriticalEPSS 0.0061 · 49th percentile

Critical, because:

CVSS score 9.8: 9.0 or more.

Published by the CVE Program (CNA: Linux) at 23 Oct 2026, 12:19 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 5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339 to before 7a53bb4668b319fc6c8a3ce2c21635125c7d2712 git affected 5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339 to before 5877d7138cc4359d26fd7b010eedfd1b3162348f git affected 5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339 to before a97114b9b00ed3d05156f3b2ddbf797296260389 git affected 5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339 to before c1803697a60f22743aa28ad522f805e92d45e3f0 git affected 5f5bc6b1e2d5a6f827bc860ef2dc5b6f365d1339 to before 858bee1c77857aabcc2327cd32dd8266332de332 git affected 43f2e3615d181a7028ab797114c5960977669b2a git affected a873146ce4fb025c0b5c1322af5a6bad042f5363 git affected 02590fd855d1690568b2fa439c942e933221b57a git affected 55e97f654cbbbef70f9714f0e113604dd931e360 git affected 3.10.83 to before 3.11 semver affected 3.12.45 to before 3.13 semver affected 3.14.47 to before 3.15 semver and 1 more Other versions: unaffected
Linux	Linux	affected 3.19 unaffected before 3.19 semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.113 to 6.12., inclusive semver unaffected 6.18.57 to 6.18., inclusive semver unaffected 7.2.11 to 7.2., inclusive semver unaffected 7.3 to *, inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-98959
CNA: Linux
Tags: Linux kernel
Published: 23 Oct 2026
Updated: 24 Oct 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

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (Linux)

CISA KEV Not listed.
EPSS 0.0061, the 49th percentile, on 6 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 23 Oct 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.