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VulnerabilityPublished Updated

CVE-2026-98315: Linux kernel · ntfs: protect runlist updates with the runlist lock

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High : upgrade to 742797432e8c9b0dd54ecc523c185e26b09d79a0 or 91709ba5d6d709b2b663287b7e871e2c6b480502 soon.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 742797432e8c9b0dd54ecc523c185e26b09d79a0, 91709ba5d6d709b2b663287b7e871e2c6b480502
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 742797432e8c9b0dd54ecc523c185e26b09d79a0 or 91709ba5d6d709b2b663287b7e871e2c6b480502.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 495e90fa334828d4119061e2726af51d0a0fb4ed, < 742797432e8c9b0dd54ecc523c185e26b09d79a0
Fixed in
  • 742797432e8c9b0dd54ecc523c185e26b09d79a0
LinuxLinuxAffected
  • ≥ 495e90fa334828d4119061e2726af51d0a0fb4ed, < 91709ba5d6d709b2b663287b7e871e2c6b480502
Fixed in
  • 91709ba5d6d709b2b663287b7e871e2c6b480502
LinuxLinuxAffected
  • =7.1
Fixed in–

AI-suggested

The vulnerability is fixed in Linux kernel versions identified by commits 742797432e8c9b0dd54ecc523c185e26b09d79a0 and 91709ba5d6d709b2b663287b7e871e2c6b480502. Users should update their Linux kernel to a version including these fixes to mitigate the issue. No additional vendor advisory indicates alternative mitigations or that no action is required.

Description

CVE-2026-98315 is a high-severity vulnerability in the Linux kernel's NTFS implementation. It involves improper synchronization when updating runlists, specifically in the ntfs_non_resident_attr_shrink() and ntfs_attr_map_cluster() functions. The flaw allowed certain runlist updates to occur without holding the required runlist write lock, risking data corruption or inconsistent state. The issue has been fixed by ensuring serialization of these operations with the runlist lock and adding rollback mechanisms to maintain integrity if updates fail.

References

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