CVE-2026-53285
mediumpriority · track · 22EPSS 0.001 · 2 %ileDEEURUUSEPSS · scored 2026-10-27
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Wrap DCN32 phantom-plane allocation in DC_RUN_WITH_PREEMPTION_ENABLED [Why] dcn32_validate_bandwidth() wraps dcn32_internal_validate_bw() with DC_FP_START()/DC_FP_END(). In x86 non-RT, DC_FP_START takes fpregs_lock(), which disables local softirqs. The DML1 path through dcn32_enable_phantom_plane() calls kvzalloc() to allocate ~335 KiB for dc_plane_state. This triggers the vmalloc path, which calls BUG_ON(in_interrupt()) because it's invoked within the FPU-enabled (softirq disabled) region, leading to a kernel crash. [How] Wrap the dc_state_create_phantom_plane() call with the DC_RUN_WITH_PREEMPTION_ENABLED() macro to allow preemption during this memory allocation. (cherry picked from commit 885ccbef7b94a8b38f69c4211c679021aa27ad11)
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (28)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2119Linux Kernel: Mehrere SchwachstellenDeutsch2026-06-28csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsmaßnahmen zu umgehen, einen Denial of Service zu verursachen und potentiell Code auszuführen.
also known as (4)
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sources
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references (9)
External citations — patches, advisories, analysis.
- https://git.kernel.org/stable/c/183182235f6d53bac62c6c39014738a54a68dfa6cnnvd
- https://git.kernel.org/stable/c/30bb2ec6695d62f63db4aa6179c4626834ed0cd6cnnvd
- https://www.kernel.org/Patchcnnvd
- https://git.kernel.org/stable/c/183182235f6d53bac62c6c39014738a54a68dfa6enisa_euvd
- https://git.kernel.org/stable/c/30bb2ec6695d62f63db4aa6179c4626834ed0cd6enisa_euvd
- https://git.kernel.org/stable/c/183182235f6d53bac62c6c39014738a54a68dfa6Patchnvd
- https://git.kernel.org/stable/c/19e82047cb68bcde55791ee20178acd431609b8dnvd
- https://git.kernel.org/stable/c/30bb2ec6695d62f63db4aa6179c4626834ed0cd6Patchnvd
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