{"id":"CVE-2026-53135","title":"drm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs\n\n[Why & How]\ndp_sdp_message_debugfs_write() dereferences connector->base.state->crtc\nwithout checkin…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < ee9cfcf77a8e8af637396dc00966df5f701e661c","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < b781f90a9528555c709e59789550893581ef0be4","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < a2de1d71891a038a9346b2c1a72b88c8350f2479","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7fc4fab4acc307ad2903312c195872b2953d32c3","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7ae95c0275c330b5dbae806f8e431720edad776f","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < bb6f705b73b5f191f14ad004e2c8c4b615806187","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < c90954cdea4d6998ec345de0d840d030c145b89e","Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < adf67034b1f61f7119295208085bfd43f85f56af","Linux 5.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:20:23.594173Z"},"published":"2026-06-25","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:24:03.663Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53135","references":[{"url":"https://git.kernel.org/stable/c/ee9cfcf77a8e8af637396dc00966df5f701e661c"},{"url":"https://git.kernel.org/stable/c/b781f90a9528555c709e59789550893581ef0be4"},{"url":"https://git.kernel.org/stable/c/a2de1d71891a038a9346b2c1a72b88c8350f2479"},{"url":"https://git.kernel.org/stable/c/7fc4fab4acc307ad2903312c195872b2953d32c3"},{"url":"https://git.kernel.org/stable/c/7ae95c0275c330b5dbae806f8e431720edad776f"},{"url":"https://git.kernel.org/stable/c/bb6f705b73b5f191f14ad004e2c8c4b615806187"},{"url":"https://git.kernel.org/stable/c/c90954cdea4d6998ec345de0d840d030c145b89e"},{"url":"https://git.kernel.org/stable/c/adf67034b1f61f7119295208085bfd43f85f56af"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02059,"ingestedAt":"2026-11-06T16:57:43.282Z","slug":"CVE-2026-53135","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL deref and buffer over-read in SDP debugfs\n\n[Why & How]\ndp_sdp_message_debugfs_write() dereferences connector->base.state->crtc\nwithout checking for NULL. A connector can be connected but not bound to\nany CRTC (e.g. after hot-plug before the next atomic commit), causing a\nkernel crash when writing to the sdp_message debugfs node.\n\nThe function also ignores the user-provided size argument and always\npasses 36 bytes to copy_from_user(), reading past the user buffer when\nsize < 36.\n\nFix both issues by:\n- Returning -ENODEV when connector->base.state or state->crtc is NULL\n- Clamping write_size to min(size, sizeof(data))\n\n(cherry picked from commit 6ab4c36a522842ff70474a1c0af2e40e50fc8300)\n\n## Affected\n\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < ee9cfcf77a8e8af637396dc00966df5f701e661c`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < b781f90a9528555c709e59789550893581ef0be4`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < a2de1d71891a038a9346b2c1a72b88c8350f2479`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7fc4fab4acc307ad2903312c195872b2953d32c3`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < 7ae95c0275c330b5dbae806f8e431720edad776f`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < bb6f705b73b5f191f14ad004e2c8c4b615806187`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < c90954cdea4d6998ec345de0d840d030c145b89e`\n- `Linux >= c7ba3653e9773256b2b08508a2ed2ca28ea7566b < adf67034b1f61f7119295208085bfd43f85f56af`\n- `Linux 5.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}