VulnerabilityPublished 18 Oct 2026

CVE-2026-98656: Linux kernel · iio: trigger: cancel reenable_work before freeing trigger

Source GCVE Database

Authoritative record:CVE-2026-98656

Not known to be exploited · fixed in e64703280ce7a23a43c27efebeb7da457c88bf5c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 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 e64703280ce7a23a43c27efebeb7da457c88bf5c, cf513df1a2c75566cdc802d9da47f62e8d6cfd18, ac5d26a46c90ff61fd574eff4e8f0d71c905828a +4

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-6556-hh6q-qw3c

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=5.15.17 <5.16 >=5.16.3 <5.17	Fixed in e64703280ce7a23a43c27efebeb7da457c88bf5c cf513df1a2c75566cdc802d9da47f62e8d6cfd18 ac5d26a46c90ff61fd574eff4e8f0d71c905828a 882d0011c59ff8ac15188ec9ce071399ecfa10ad 5.17 5.16 2a57b9246cecd5dd797a42eb310d6c8816f26d9e
LinuxLinux	Affected =5.17	Fixed in–

AI-suggested

A fix has been implemented that cancels the deferred reenable_work before freeing the trigger in the iio subsystem. Users should apply the official kernel update that includes this fix once available. Since this is a kernel-level issue, updating to the patched kernel version is the recommended remediation. Patch status is not explicitly confirmed in the provided data; check the vendor or kernel mailing list advisories for the current remediation status and available updates.

Description

A use-after-free vulnerability in the Linux kernel's Industrial I/O (iio) trigger subsystem was resolved by ensuring that deferred work is canceled before the trigger is freed. The issue involved a deferred reenable_work task that could access freed memory, potentially causing instability or crashes.

References

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