CVE record · CVE-2026-80866

tipc: avoid busy looping in tipc_exit_net()

No CVSS scoreEPSS 0.0020 · 9th percentile

Published by the CVE Program (CNA: Linux) at 4 Sept 2026, 16:48 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 04c26faa51d1e2fe71cf13c45791f5174c37f986 to before 772769859226a5b004442403510acb58a1c32e72 git affected 04c26faa51d1e2fe71cf13c45791f5174c37f986 to before 99b82c8452887408ea908fdfa5df33c4a5dfa88f git affected 04c26faa51d1e2fe71cf13c45791f5174c37f986 to before 110bb16d37bdba03213156c0df37e7119c190936 git affected 04c26faa51d1e2fe71cf13c45791f5174c37f986 to before 7672973957e3e20780afe5937a9fec70b72bc060 git affected 04c26faa51d1e2fe71cf13c45791f5174c37f986 to before 522d1d950b9e3b68190a6de7534827c8dccedb73 git affected 04c26faa51d1e2fe71cf13c45791f5174c37f986 to before c1481c94e74c955e0448ddf46b8615a44d840c1e git affected d1f76dfadaf8f47ed1753f97dbcbd41c16215ffa git affected 5195ec5e365a2a9331bfeb585b613a6e94f98dba git affected b9f5b7ad4ac3af006443f535b1ce7bff1d130d7d git affected 5.4.124 to before 5.5 semver affected 5.10.42 to before 5.11 semver affected 5.12.9 to before 5.13 semver Other versions: unaffected
Linux	Linux	affected 5.13 unaffected before 5.13 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 6.18.57 to 6.18., inclusive semver unaffected 7.1.5 to 7.1., inclusive semver unaffected 7.2 to , inclusive original_commit_for_fix Other versions: affected

Identifiers: CVE-2026-80866
CNA: Linux
Tags: Linux kernel
Published: 4 Sept 2026
Updated: 30 Oct 2026

Machine-written summary

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

Linux kernel versions from 5.13 before the fixed releases have a TIPC networking flaw in which network namespace teardown busy-waits, wasting CPU and possibly causing soft lockups. The source does not describe what an attacker would need to trigger it. Upgrade to 6.1.191, 6.6.160, 6.12.114, or 6.18.57 or later in the respective 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 0.0020, the 9th 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 4 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.