AZL-91322
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-91322.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-91322
- Upstream
- Published
- 2026-06-26T20:17:21Z
- Modified
- 2026-08-30T05:26:50Z
- Summary
- CVE-2026-53285 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Wrap DCN32 phantom-plane allocation in DCRUNWITHPREEMPTIONENABLED
[Why] dcn32validatebandwidth() wraps dcn32internalvalidatebw() with DCFPSTART()/DCFPEND(). In x86 non-RT, DCFPSTART takes fpregslock(), which disables local softirqs.
The DML1 path through dcn32enablephantomplane() calls kvzalloc() to allocate ~335 KiB for dcplanestate. This triggers the vmalloc path, which calls BUGON(in_interrupt()) because it's invoked within the FPU-enabled (softirq disabled) region, leading to a kernel crash.
[How] Wrap the dcstatecreatephantomplane() call with the DCRUNWITHPREEMPTIONENABLED() macro to allow preemption during this memory allocation.
(cherry picked from commit 885ccbef7b94a8b38f69c4211c679021aa27ad11)
- References