SB20260918222 - Use-after-free in Linux kernel firmware arm_scmi driver
Published: September 18, 2026
Security Bulletin ID
SB20260918222
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-92491)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a use-after-free condition.
The vulnerability exists due to use-after-free in scmi_protocol_table_register() when a later protocol ID-table entry request fails after earlier requests have been registered. A local user can load a module whose protocol table registration fails to cause a use-after-free condition.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2224b622260ba590ab56ea1585d6bf7610be25b2
- https://git.kernel.org/stable/c/3fa8cabd2d8ed80dd0b818ca7fd410b591392ff6
- https://git.kernel.org/stable/c/456856a34906475fcf4b23879237103770dc7ef2
- https://git.kernel.org/stable/c/826413b858ea2969e4c3e8197d0065efc47c6343
- https://git.kernel.org/stable/c/ee556d118b11c6f5b60a32c1e84f366b336ac7d7