CVE-2025-71311: Linux kernel · fs/ntfs3: Initialize new folios before use
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 8.2 High.
Data as of 26 Oct 2026, 13:47 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 27 May 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
AI-suggested
The description states the issue has been resolved, implying a fix exists in updated Linux kernel versions. Users should update to the latest kernel releases that include this fix once available.
Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Initialize new folios before use KMSAN reports an uninitialized value in longest_match_std(), invoked from ntfs_compress_write(). When new folios are allocated without being marked uptodate and ni_read_frame() is skipped because the caller expects the frame to be completely overwritten, some reserved folios may remain only partially filled, leaving the rest memory uninitialized.
References
- nvd.nist.gov/vuln/detail/CVE-2025-71311 (opens in a new tab)
- git.kernel.org/stable/c/41d79f8e2a36622d148719bf7c18b46ac1264284 (opens in a new tab)
- git.kernel.org/stable/c/5a30cc03bde169ad558695b26da6ea7e55f6194a (opens in a new tab)
- git.kernel.org/stable/c/dd6c81527d097b3b0bf5a15c2fdc9657d045144c (opens in a new tab)
- git.kernel.org/stable/c/f223ebffa185cc8da934333c5a31ff2d4f992dc9 (opens in a new tab)
- ubuntu.com/security/CVE-2025-71311 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-71311 (opens in a new tab)
- git.kernel.org/linus/f223ebffa185cc8da934333c5a31ff2d4f992dc9 (opens in a new tab)