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VulnerabilityPublished

CVE-2026-98984: Linux kernel · dcache: don't put a mountpoint on a dentry that's being removed

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited · fixed in 793cb67b0f52d00c67bd0e76bc57455b5c70ebb8 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity
Medium

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 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 793cb67b0f52d00c67bd0e76bc57455b5c70ebb8, 390ddcea2a8aca411b931a8e2863a80ccca8d2b3, 75f4197f1e11d2eb75c2d6f916a7d4764db621e5 +6

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 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 to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=4.1.40 <4.2
  • >=4.4.54 <4.5
  • >=4.9.15 <4.10
  • >=4.10.3 <4.11
Fixed in
  • 793cb67b0f52d00c67bd0e76bc57455b5c70ebb8
  • 390ddcea2a8aca411b931a8e2863a80ccca8d2b3
  • 75f4197f1e11d2eb75c2d6f916a7d4764db621e5
  • 30a1625022411a387cce9239408ece9955bc9c58
  • 5e6bfd9f249f2c74bb63c0f06ad959da3bee0971
  • 4.11
  • 4.10
  • 4.5
  • 4.2
LinuxLinuxAffected
  • =4.11
Fixed in–

AI-suggested

A fix has been implemented in Linux kernel versions 4.2, 4.5, 4.10, and 4.11 and their respective stable updates. Users should upgrade to these fixed versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2026-98984 is a Linux kernel vulnerability involving the dcache subsystem where a mountpoint can be incorrectly assigned to a dentry that is in the process of being removed. This occurs due to a race condition between mountpoint detachment and directory removal operations, potentially causing a mount to remain attached to a removed directory indefinitely.

References

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