CVE-2026-80991: Linux Linux

net: ravb: serialize PTP clock teardown

CVSS 7.8 HighEPSS 0.0016 · 5th percentile

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:42 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 a0d2f20650e81407d8e51ad2cbdc492861c74e9c to before 0400b9c5608933289bcacc3886dd3e4f6b7695f1 git affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c to before b917f37bfcce919a969d66a044580a95b11df31c git affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c to before 695acb5534a9e366efb47b40c7487fc56488b09b git affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c to before 67a82e6f886beed0de8f8da08bb767e68fba952d git affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c to before 66b50c31419e7946e9aa325a468ad9b64c961a25 git affected a0d2f20650e81407d8e51ad2cbdc492861c74e9c to before 1cb9663789c5b7a12fcd419fcca6d6254c398252 git Other versions: unaffected
Linux	Linux	affected 4.2 unaffected before 4.2 semver unaffected 6.1.191 to 6.1., inclusive semver unaffected 6.6.160 to 6.6., inclusive semver unaffected 6.12.109 to 6.12., inclusive semver unaffected 6.18.50 to 6.18., inclusive semver unaffected 7.2.4 to 7.2., inclusive semver unaffected 7.3 to , inclusive original_commit_for_fix Other versions: affected

Identifiers

CVE-2026-80991

CNA

Linux

Machine-written summary

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

Linux kernel's ravb network driver (Renesas Ethernet AVB) is vulnerable to a use-after-free during PTP clock teardown, where an interrupt handler can race with the clock being unregistered. The source gives few details on how an attacker would trigger it. The fix is to upgrade to a fixed kernel version: 4.2 and later versions before the listed fixes, or the stable releases 6.1.191, 6.6.160, 6.12.109, or 6.18.50 and their later updates. No workaround is listed.

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

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

CISA KEV Not listed.
EPSS 0.0016, the 5th percentile, on 14 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 11 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.