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VulnerabilityPublished Updated

CVE-2026-98439: Linux kernel · smb/server: cancel async requests when closing connection

Affects Linux kernelSource CVE Database V5

0

Not known to be exploited : upgrade to 0947087678f465b64eba2acebe808d5c6cfea036 or 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851 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 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0947087678f465b64eba2acebe808d5c6cfea036, 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 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 0947087678f465b64eba2acebe808d5c6cfea036 or 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 0947087678f465b64eba2acebe808d5c6cfea036
Fixed in
  • 0947087678f465b64eba2acebe808d5c6cfea036
LinuxLinuxAffected
  • ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851
Fixed in
  • 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851
LinuxLinuxAffected
  • =5.15
Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel versions identified by the fixed commit hashes. Users should update their Linux kernel to a version including these fixes to remediate the vulnerability.

Description

A vulnerability in the Linux kernel's SMB server implementation allowed asynchronous requests to remain active when a connection was closed, potentially preventing the connection from closing properly. The issue has been resolved by canceling active asynchronous requests before waiting for them to finish.

References

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