CVE-2025-71069: Linux kernel · f2fs: invalidate dentry cache on failed whiteout creation
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1103.110~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1103.110~20.04.1, 5.15.0-1110.119~20.04.1, 5.15.0-1103.112~20.04.1 +70
Exploitation evidence
Disclosed: evidence found.
CVE published 13 Jan 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 25.10linuxpkg:deb/ubuntu/linux@6.17.0-22.22?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1012.12?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1013.13?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp@6.17.0-1012.12?arch=source&distro=questingOther threats | Affected
| Fixed in
|
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1011.11?arch=source&distro=questingOther 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 patch is available that fixes this issue by invalidating dentries on failed whiteout creation to maintain cache consistency. Users should apply the official Linux kernel updates provided by their distribution, such as the Ubuntu security notice USN-8096-1. No additional mitigation is required once the patch is applied.
Description
A vulnerability in the Linux kernel's F2FS filesystem driver allows stale directory entry cache to persist after a failed whiteout creation during rename operations on corrupted directories. This can cause the kernel to reference freed inodes incorrectly, potentially triggering warnings and instability. The issue occurs when partial directory modifications are committed to disk but the dentry cache is not updated due to an error in adding the whiteout entry. This vulnerability has been fixed by invalidating the affected dentries to ensure cache consistency.
References
- ubuntu.com/security/CVE-2025-71069 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-71069 (opens in a new tab)
- git.kernel.org/linus/d33f89b34aa313f50f9a512d58dd288999f246b0 (opens in a new tab)
- git.kernel.org/stable/c/0dde30753c1e8648665dbe069d814e540ce2fd37 (opens in a new tab)
- git.kernel.org/stable/c/3d65e27e57aaa9d66709fda4cbfb62a87c04a3f5 (opens in a new tab)
- git.kernel.org/stable/c/64587ab4d1f16fc94f70e04fa87b2e3f69f8a7bb (opens in a new tab)
- git.kernel.org/stable/c/c89845fae250efdd59c1d4ec60e9e1c652cee4b6 (opens in a new tab)
- git.kernel.org/stable/c/d33f89b34aa313f50f9a512d58dd288999f246b0 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8116-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8096-5 (opens in a new tab)
- ubuntu.com/security/notices/USN-8141-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8163-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8163-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8177-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8179-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8177-2 (opens in a new tab)