CVE-2026-80866: tipc: avoid busy looping in tipc_exit_net()

mediumCVSS 4.1CVE-2026-80866

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.1
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80866

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-808660.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80866	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-80866: In the Linux kernel, the following vulnerability has been resolved: tipc: avoid busy looping i…nvd

Recent advisories for tipc

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-80866: In the Linux kernel, the following vulnerability has been resolved: tipc: avoid busy looping i…nvd · 2026-09-04
highCVE-2026-74609: In the Linux kernel, the following vulnerability has been resolved: tipc: read le->link under …nvd · 2026-08-22
highCVE-2026-74490: In the Linux kernel, the following vulnerability has been resolved: tipc: avoid use-after-free…nvd · 2026-08-15
highCVE-2026-74283: In the Linux kernel, the following vulnerability has been resolved: tipc: require net admin fo…nvd · 2026-08-15
highCVE-2026-74282: In the Linux kernel, the following vulnerability has been resolved: tipc: prevent snt_unacked …nvd · 2026-08-15
highCVE-2026-74281: In the Linux kernel, the following vulnerability has been resolved: tipc: reject inverted serv…nvd · 2026-08-15