CVE-2026-53135
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)
Affected products
16cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.2,<5.10.259
- cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*
- (no CPE)
- osv-coords8 versionspkg:apk/chainguard/linux-azure-6.18pkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-gcp-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:apk/chainguard/linux-qemu-melangepkg:apk/chainguard/linux-vmware-6.18pkg:linux/kernel
< 6.18.38-r0+ 7 more
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: < 6.18.38-r0
- (no CPE)range: >= 5.2.0, < 5.10.259
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776fnvdPatch
- git.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3nvdPatch
- git.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479nvdPatch
- git.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56afnvdPatch
- git.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4nvdPatch
- git.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187nvdPatch
- git.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89envdPatch
- git.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661cnvdPatch
News mentions
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