SB20261022445 - Missing Release of Resource after Effective Lifetime in Linux kernel rtc driver

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-98826)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to potentially prevent successful initialization of the AC100 RTC device.

The vulnerability exists due to missing release of the RTC-32k clock in the Linux kernel AC100 RTC driver when probing fails after clock registration, including when the ADDA 4M parent clock cannot be found. A local user can potentially trigger an affected failure path to leave the clock registered, causing a later probe of the same device to fail because its clock name is already present in the global clock list.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/12bcd20d76703ee2baf52224d287b7fea096b12f
• https://git.kernel.org/stable/c/55ca60ba336632349f7c4585d22ba74ae355b7ce
• https://git.kernel.org/stable/c/9cff19ddd7f90c1f572a0f83cfc41de8f8dcbcd8
• https://git.kernel.org/stable/c/fcf0b58e976e83adf246b014518e49c662b96f5e