CVE-2026-80881: Linux kernel · ocfs2: fix buffer head management in ocfs2_read_blocks()
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +40
Exploitation evidence
Disclosed: evidence found.
CVE published 4 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 |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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
An official patch is available and should be applied to affected Linux kernel versions to resolve this issue. Users should update their linux-aws kernel packages to versions including the fix. No additional mitigation steps are indicated by the vendor advisory.
Description
A vulnerability in the Linux kernel's ocfs2 filesystem code was fixed, addressing improper buffer head management in the ocfs2_read_blocks() function. The issue involved incorrect assumptions about buffer head ownership, potentially causing stale buffer heads with invalid data to be used in the OCFS2 metadata cache. This could lead to data inconsistency or corruption. Multiple specific linux-aws kernel versions are affected. A patch is available to correct this flaw.
References
- nvd.nist.gov/vuln/detail/CVE-2026-80881 (opens in a new tab)
- git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310 (opens in a new tab)
- git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa (opens in a new tab)
- git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d (opens in a new tab)
- git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766 (opens in a new tab)
- git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a (opens in a new tab)
- git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e (opens in a new tab)
- git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d (opens in a new tab)
- git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17 (opens in a new tab)
- ubuntu.com/security/CVE-2026-80881 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80881 (opens in a new tab)
- git.kernel.org/linus/6371a07148ee979af22a9d6f4c277462953a9a4a (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)