CVE-2026-53285
- Source
- https://cve.org/CVERecord?id=CVE-2026-53285
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53285.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-53285
- Downstream
- Published
- 2026-06-26T19:40:46.328Z
- Modified
- 2026-07-09T03:51:31.965298233Z
- Summary
- drm/amd/display: Wrap DCN32 phantom-plane allocation in DC_RUN_WITH_PREEMPTION_ENABLED
- 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)
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53285.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/183182235f6d53bac62c6c39014738a54a68dfa6
- https://git.kernel.org/stable/c/30bb2ec6695d62f63db4aa6179c4626834ed0cd6
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53285.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-53285
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git