CVE-2026-99181: Linux kernel · autofs: ignore notification errors from a replaced pipe
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 03:51 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix for this vulnerability is available in updated Linux kernel versions that ensure atomic state transitions when handling replaced pipe notification errors in autofs. Users should apply the official kernel updates that include this fix. No additional mitigation actions are required as the issue is resolved by the patch.
Description
CVE-2026-99181 is a Linux kernel vulnerability in the autofs subsystem where notification errors from a replaced pipe were not properly handled. This flaw could cause denial of service of the shared autofs service during a legitimate daemon restart. The issue does not lead to memory corruption, information disclosure, privilege escalation, or code execution. The vulnerability was reproduced in specific kernel versions and fixed by ensuring atomic state transitions when handling pipe replacement errors.
References
- ubuntu.com/security/CVE-2026-99181 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99181 (opens in a new tab)
- git.kernel.org/stable/c/65676cd4203c0e41a94caf54080a7f0a95434bda (opens in a new tab)
- git.kernel.org/stable/c/fb296391f685d82dbb93621a970fb234cea45280 (opens in a new tab)
- git.kernel.org/stable/c/1a177064f501ed4b67873a43aae5d5bdb18b3704 (opens in a new tab)