SB20260925149 - Incorrect calculation in Linux kernel clocksource driver
Published: September 25, 2026
Security Bulletin ID
SB20260925149
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) Incorrect calculation (CVE-ID: CVE-2026-93219)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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.
The vulnerability exists due to an incorrect minimum interval calculation in the sun4i clockevent timer driver when processing timer events. A local user can trigger timer events to cause a denial of service.
The issue can leave the next timer event stuck during oneshot, high-resolution, or nohz timer operation.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943
- https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc
- https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98
- https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7
- https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252
- https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e
- https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44
- https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb