CVE-2026-93222: Linux kernel · signal: avoid shared siginfo namespace rewrites
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e015d1ac6b43a23c52c5163299414ae77d7d4ae0 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in e015d1ac6b43a23c52c5163299414ae77d7d4ae0, d19cdc167e696714509e87d3f7ae765b6e164589, b655c2040ce836afad5643842543567b31f8c11d +7
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
This vulnerability has been fixed in Linux kernel versions 5.2, 5.3, and related commits. Users should upgrade to these fixed versions or later to remediate the issue.
Description
A vulnerability in the Linux kernel signal handling mechanism allowed shared siginfo structures to be rewritten across processes, causing one recipient of a group signal to affect another. This issue was fixed by copying the siginfo before modification to prevent namespace rewrites.
References
- git.kernel.org/stable/c/e015d1ac6b43a23c52c5163299414ae77d7d4ae0 (opens in a new tab)
- git.kernel.org/stable/c/4ee7c4e4719a825052f42f02ec159b5b42b68fbc (opens in a new tab)
- git.kernel.org/stable/c/148b0dae2a1755beb873a2aab51fb191414f068c (opens in a new tab)
- git.kernel.org/stable/c/6b1de022304ef85284c5933a5fb8492f6f54efc9 (opens in a new tab)
- git.kernel.org/stable/c/03c8761e75d1619906bb503686f9cc1dfc6a67f4 (opens in a new tab)
- git.kernel.org/stable/c/a246da20c8e4ae4319511c698b9f26ad0ad1769f (opens in a new tab)
- git.kernel.org/stable/c/b655c2040ce836afad5643842543567b31f8c11d (opens in a new tab)
- git.kernel.org/stable/c/d19cdc167e696714509e87d3f7ae765b6e164589 (opens in a new tab)