VulnerabilityPublished 18 Oct 2026

CVE-2026-98752: Linux kernel · tty: port: fix tty_port_tty_vhangup() race

Source GCVE Database

Authoritative record:CVE-2026-98752

Not known to be exploited · fixed in ce220b4cdf62f73db0c1940f968eb33b9899fdd0 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ce220b4cdf62f73db0c1940f968eb33b9899fdd0, b48820de8c1a596c5b99775524dfce73c6576c5d, 017b18addbe8dcace1a569a00d40ed1ba1e03f4c +3

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-2697-8gj7-2gh6

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=2.6.31.2 <2.6.32	Fixed in ce220b4cdf62f73db0c1940f968eb33b9899fdd0 b48820de8c1a596c5b99775524dfce73c6576c5d 017b18addbe8dcace1a569a00d40ed1ba1e03f4c 6d1a984afc3ca477dab3e51ec806671d443ad524 6b7be3b9b857947e9c1338d4919d4ebd3b75e907 2.6.32
LinuxLinux	Affected =2.6.32	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel by adding serialization to the tty_port_tty_vhangup() and tty_port_hangup() functions. Users should apply the official kernel updates that include this fix. Since this is a kernel-level issue, upgrading to a patched kernel version is the recommended remediation.

Description

A race condition vulnerability in the Linux kernel's tty port handling was resolved. The function tty_port_tty_vhangup() could return before the port was fully shut down if it raced with another hangup, potentially causing use-after-free and NULL-pointer dereferences during concurrent ioctl or hangup operations. The fix adds serialization to ensure the function does not return until the port shutdown is complete, preventing these race conditions.

References

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