CVE-2026-43168: Linux kernel · ocfs2: fix reflink preserve cleanup issue
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in c44d86ca949cb1e5566ad14510cc26fa1a17e2d8 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 15:51 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in c44d86ca949cb1e5566ad14510cc26fa1a17e2d8, bb273b68c1719c2925e05557f7e7099edb066680, b2952dbeac2c3c527cb0519d5ffaeb95b062466a +5
Exploitation evidence
Disclosed: evidence found.
CVE published 6 May 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
This vulnerability has been fixed in several Linux kernel commits identified by their hashes. Users should update their Linux kernel to a version that includes these fixes to remediate the issue. Since this is a kernel-level fix, applying the updated kernel version is the recommended mitigation.
Description
A vulnerability in the Linux kernel's ocfs2 filesystem component related to reflink preserve cleanup has been fixed. The issue involved improper handling of cleanup for preserved extended attribute (xattr) entries, specifically failing to shift the 'last' pointer correctly and not cleaning up the first entry when the count was one. This bug was addressed in multiple fixed commits.
References
- git.kernel.org/stable/c/c44d86ca949cb1e5566ad14510cc26fa1a17e2d8 (opens in a new tab)
- git.kernel.org/stable/c/02acc9f72365e50eb45a56b7dacb9114ca3b503c (opens in a new tab)
- git.kernel.org/stable/c/8ff329353134280b203cb2bce95311cb8f7cbd8a (opens in a new tab)
- git.kernel.org/stable/c/bb273b68c1719c2925e05557f7e7099edb066680 (opens in a new tab)
- git.kernel.org/stable/c/b2952dbeac2c3c527cb0519d5ffaeb95b062466a (opens in a new tab)
- git.kernel.org/stable/c/3bdc3766aafb052aef4baadef455a84c1c0a059d (opens in a new tab)
- git.kernel.org/stable/c/2f4daccd9d9b8b2952df7878df8c2e8ba6439398 (opens in a new tab)
- git.kernel.org/stable/c/5138c936c2c82c9be8883921854bc6f7e1177d8c (opens in a new tab)