CVE-2026-98439: Linux kernel · smb/server: cancel async requests when closing connection
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to 0947087678f465b64eba2acebe808d5c6cfea036 or 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851 when convenient.
Data as of 26 Oct 2026, 14:18 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 0947087678f465b64eba2acebe808d5c6cfea036, 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 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 0947087678f465b64eba2acebe808d5c6cfea036 or 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| 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.