CVE-2026-98140: Linux kernel · ntfs: fix kmap_local leak in write_mft_record_nolock() error paths
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to cf06dcd572845723821b54a608fc2da995c3c8e2 or 5d7f7bf8fba8cf563b42b44aa4ab3d9928ac480c when convenient.
Data as of 26 Oct 2026, 13:47 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in cf06dcd572845723821b54a608fc2da995c3c8e2, 5d7f7bf8fba8cf563b42b44aa4ab3d9928ac480c
Exploitation evidence
Disclosed: evidence found.
CVE published 25 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 Linux kernel to cf06dcd572845723821b54a608fc2da995c3c8e2 or 5d7f7bf8fba8cf563b42b44aa4ab3d9928ac480c.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available in the Linux kernel versions identified by the commits cf06dcd572845723821b54a608fc2da995c3c8e2 and 5d7f7bf8fba8cf563b42b44aa4ab3d9928ac480c. Users and administrators should update to these fixed kernel versions or later to remediate the issue.
Description
A vulnerability in the Linux kernel's NTFS implementation caused a kmap_local mapping leak in the write_mft_record_nolock() function's error paths. Specifically, failure paths in pre_write_mst_fixup() and bio_add_folio() did not unmap the MFT record folio, corrupting the stack-ordered kmap_local mappings. This issue has been fixed by ensuring the folio is unmapped on those error paths.