CVE-2026-53285drm/amd/display: Wrap DCN32 phantom-plane allocation in DC_RUN_WITH_PREEMPTION_ENABLED
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 235c67634230b0f9ad8c0185272fed36c892b1c4 before a8c1480bb066cf0f6e79129b7292e1c99ff68b9b; 235c67634230b0f9ad8c0185272fed36c892b1c4 builds before 30bb2ec6695d62f63db4aa6179c4626834ed0cd6; from 235c67634230b0f9ad8c0185272fed36c892b1c4 before 183182235f6d53bac62c6c39014738a54a68dfa6 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.0 before 7.0.10; 7.1; 7.1; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/a8c1480bb066cf0f6e79129b7292e1c99ff68b9b
- https://git.kernel.org/stable/c/30bb2ec6695d62f63db4aa6179c4626834ed0cd6patch
- https://git.kernel.org/stable/c/183182235f6d53bac62c6c39014738a54a68dfa6patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.