SB20260812290 - Reachable assertion in Linux kernel amd amdgpu driver
Published: August 12, 2026
Security Bulletin ID
SB20260812290
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) Reachable assertion (CVE-ID: CVE-2026-68252)
CWE-ID: CWE-617 - Reachable Assertion
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 improper handling of invalid address alignment checks in sdma_v7_0_ring_emit_fence() in the amdgpu SDMA v7.0 driver when processing fence addresses. A local user can trigger a misaligned fence address condition to cause a denial of service.
The issue results in a kernel crash because a BUG_ON() assertion is reachable in this code path.
Remediation
Install update from vendor's website.