VulnerabilityPublished 18 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98439· Medium

Not known to be exploited : upgrade to 0947087678f465b64eba2acebe808d5c6cfea036 or 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851 when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated by Threat Radar · 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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-xm6x-r8m7-4r79

What to do

Upgrade Linux kernel to 0947087678f465b64eba2acebe808d5c6cfea036 or 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 0947087678f465b64eba2acebe808d5c6cfea036	Fixed in 0947087678f465b64eba2acebe808d5c6cfea036
LinuxLinux	Affected ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851	Fixed in 4fd5bad647bfa45eb86bfd2f03ba1bef3fcd5851
LinuxLinux	Affected =5.15	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to cancel active asynchronous requests before closing connections. Users should apply the official kernel updates that include this fix to resolve the vulnerability.

Description

A vulnerability in the Linux kernel's SMB server component was resolved by ensuring asynchronous requests are canceled when closing a connection. Previously, an async request might remain pending during connection closure, preventing the connection from closing properly.

References

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