SB20261022366 - Use-after-free in Linux kernel typec ucsi driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98758)

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 memory corruption that may result in a denial of service through a kernel crash.

The vulnerability exists due to use-after-free in the Linux kernel UCSI GLINK driver when queued work executes after the UCSI instance has been unregistered during device removal. Notification callbacks can continue queuing work before device-managed cleanup releases the pmic_glink client, allowing that work to dereference the freed connector array or register and unregister the instance again. A local user can potentially exploit this removal-time race to access freed kernel state and cause a kernel crash.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/41934f92e7a54d4080ac0b17aacc83224946785c
• https://git.kernel.org/stable/c/432b58cd959e594909a581b4974396cdbc9d4ca1
• https://git.kernel.org/stable/c/63b269ec537dc0fd26d0bd64872c26860d108c9d
• https://git.kernel.org/stable/c/ee8577de01c6b6c7dd1d76b52242c54d37a989f4