SB20260917145 - Division by zero in Linux kernel display amdgpu_dm driver
Published: September 17, 2026
Security Bulletin ID
SB20260917145
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) Division by zero (CVE-ID: CVE-2026-89821)
CWE-ID: CWE-369 - Divide By Zero
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 a divide-by-zero error in the __is_lut_linear() function when processing a single-entry lookup table. A local user can trigger processing of a single-entry lookup table to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f
- https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64
- https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44
- https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2
- https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f
- https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734
- https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084
- https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe