SB20261022242 - Use-after-free in Linux kernel iio driver
Published: October 22, 2026
Security Bulletin ID
SB20261022242
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98656)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service through a potential kernel crash.
The vulnerability exists due to use-after-free in the Linux kernel IIO trigger subsystem when pending reenable_work executes after its owning trigger has been freed by iio_trig_release(). A local user can potentially trigger a race between deferred interrupt work and trigger teardown to cause access to freed kernel memory and crash the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2a57b9246cecd5dd797a42eb310d6c8816f26d9e
- https://git.kernel.org/stable/c/882d0011c59ff8ac15188ec9ce071399ecfa10ad
- https://git.kernel.org/stable/c/ac5d26a46c90ff61fd574eff4e8f0d71c905828a
- https://git.kernel.org/stable/c/cf513df1a2c75566cdc802d9da47f62e8d6cfd18
- https://git.kernel.org/stable/c/e64703280ce7a23a43c27efebeb7da457c88bf5c