VulnerabilityPublished 18 Oct 2026

CVE-2026-98758: Linux kernel · usb: typec: ucsi: glink: fix use-after-free of ucsi on remove

Source GCVE Database

Authoritative record:CVE-2026-98758· High

Not known to be exploited · fixed in ee8577de01c6b6c7dd1d76b52242c54d37a989f4 : patch Linux kernel soon.

Data as of 26 Oct 2026, 16:00 UTC

Severity

High

Rated by Threat Radar · 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 ee8577de01c6b6c7dd1d76b52242c54d37a989f4, 41934f92e7a54d4080ac0b17aacc83224946785c, 432b58cd959e594909a581b4974396cdbc9d4ca1 +1

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-hvv7-vw9m-6v98

What to do

Upgrade Linux kernel to ee8577de01c6b6c7dd1d76b52242c54d37a989f4, 41934f92e7a54d4080ac0b17aacc83224946785c, 432b58cd959e594909a581b4974396cdbc9d4ca1 or 63b269ec537dc0fd26d0bd64872c26860d108c9d.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 62b5412b1f4afab27d8df90ddcabb8e1e11a00ad, < ee8577de01c6b6c7dd1d76b52242c54d37a989f4	Fixed in ee8577de01c6b6c7dd1d76b52242c54d37a989f4
LinuxLinux	Affected ≥ 62b5412b1f4afab27d8df90ddcabb8e1e11a00ad, < 41934f92e7a54d4080ac0b17aacc83224946785c	Fixed in 41934f92e7a54d4080ac0b17aacc83224946785c
LinuxLinux	Affected ≥ 62b5412b1f4afab27d8df90ddcabb8e1e11a00ad, < 432b58cd959e594909a581b4974396cdbc9d4ca1	Fixed in 432b58cd959e594909a581b4974396cdbc9d4ca1
LinuxLinux	Affected ≥ 62b5412b1f4afab27d8df90ddcabb8e1e11a00ad, < 63b269ec537dc0fd26d0bd64872c26860d108c9d	Fixed in 63b269ec537dc0fd26d0bd64872c26860d108c9d
LinuxLinux	Affected =6.4	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to address this issue by disabling work items before unregistering and verifying the registration state. Users should apply the official kernel updates that include this fix.

Description

A use-after-free vulnerability in the Linux kernel's USB Type-C UCSI glink component was resolved. The issue occurs because work items can run after the UCSI instance has been unregistered and freed, leading to dereferencing freed memory. The fix involves disabling work items before unregistering and ensuring the instance is only unregistered if still registered. This vulnerability was identified by an internal static analysis tool.

References

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