CVE-2026-23100: Linux kernel · mm/hugetlb: fix hugetlb_pmd_shared()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ca1a47cd3f5f4c46ca188b1c9a27af87d1ab2216 : update Linux kernel when convenient.
Data as of 10 Nov 2026, 13:03 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- Patch
- Available – fixed in ca1a47cd3f5f4c46ca188b1c9a27af87d1ab2216, bf3c2affe245cf831866ddc8f736ae6a22cdc11c, 69c4e241ff13545d410a8b2a688c932182a858bf +9
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Feb 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 10 Nov 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
Fixed versions are available and should be applied. The patches have been merged into Linux kernel versions 5.10.253, 5.15.203, 6.1.167, 6.6.127, and 6.12.74, among others. Users and administrators should upgrade to these or later kernel versions to resolve the issue. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's hugetlb subsystem was fixed by correcting the hugetlb_pmd_shared() function. The flaw caused incorrect detection of shared PMD tables, leading to improper handling of page migration and memory accounting. The fix involves using an independent shared count to identify shared page tables correctly, addressing both functional and performance issues.
References
- git.kernel.org/stable/c/8ae48255bcb17b32436be97553dca848730d365f (opens in a new tab)
- git.kernel.org/stable/c/bf3c2affe245cf831866ddc8f736ae6a22cdc11c (opens in a new tab)
- git.kernel.org/stable/c/5b2aec77f92265a9028c5f632bdd9af5b57ec3a3 (opens in a new tab)
- git.kernel.org/stable/c/51dcf459845fd28f5a0d83d408a379b274ec5cc5 (opens in a new tab)
- git.kernel.org/stable/c/3a18b452dd5f7f1652c2e92f8ae769aa17a66c9e (opens in a new tab)
- git.kernel.org/stable/c/69c4e241ff13545d410a8b2a688c932182a858bf (opens in a new tab)
- git.kernel.org/stable/c/ca1a47cd3f5f4c46ca188b1c9a27af87d1ab2216 (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)