drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs
Summary
| CVE | CVE-2026-53135 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-25 09:16:30 UTC |
| Updated | 2026-06-25 09:16:30 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs [Why & How] dp_sdp_message_debugfs_write() dereferences connector->base.state->crtc without checking for NULL. A connector can be connected but not bound to any CRTC (e.g. after hot-plug before the next atomic commit), causing a kernel crash when writing to the sdp_message debugfs node. The function also ignores the user-provided size argument and always passes 36 bytes to copy_from_user(), reading past the user buffer when size < 36. Fix both issues by: - Returning -ENODEV when connector->base.state or state->crtc is NULL - Clamping write_size to min(size, sizeof(data)) (cherry picked from commit 6ab4c36a522842ff70474a1c0af2e40e50fc8300) |
Risk And Classification
EPSS: 0.001760000 probability, percentile 0.073860000 (date 2026-06-26)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b ee9cfcf77a8e8af637396dc00966df5f701e661c git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b b781f90a9528555c709e59789550893581ef0be4 git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b a2de1d71891a038a9346b2c1a72b88c8350f2479 git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b 7fc4fab4acc307ad2903312c195872b2953d32c3 git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b 7ae95c0275c330b5dbae806f8e431720edad776f git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b bb6f705b73b5f191f14ad004e2c8c4b615806187 git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b c90954cdea4d6998ec345de0d840d030c145b89e git | Not specified |
| CNA | Linux | Linux | affected c7ba3653e9773256b2b08508a2ed2ca28ea7566b adf67034b1f61f7119295208085bfd43f85f56af git | Not specified |
| CNA | Linux | Linux | affected 5.2 | Not specified |
| CNA | Linux | Linux | unaffected 5.2 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.259 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.210 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.94 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.36 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.13 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56af | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.