drm/amd/display: Wrap DCN32 phantom-plane allocation in DC_RUN_WITH_PREEMPTION_ENABLED
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)
CVE-2026-53285
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53285
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "235c67634230b0f9ad8c0185272fed36c892b1c4",
"lessThan": "19e82047cb68bcde55791ee20178acd431609b8d",
"versionType": "git"
},
{
"status": "affected",
"version": "235c67634230b0f9ad8c0185272fed36c892b1c4",
"lessThan": "a8c1480bb066cf0f6e79129b7292e1c99ff68b9b",
"versionType": "git"
},
{
"status": "affected",
"version": "235c67634230b0f9ad8c0185272fed36c892b1c4",
"lessThan": "30bb2ec6695d62f63db4aa6179c4626834ed0cd6",
"versionType": "git"
},
{
"status": "affected",
"version": "235c67634230b0f9ad8c0185272fed36c892b1c4",
"lessThan": "183182235f6d53bac62c6c39014738a54a68dfa6",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53285
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46387 · Revision 1
- Added to Heist Feed
- Publisher date