{"schema":"threatline.record/2","record":{"id":"CVE-2026-99151","aliases":[],"summary":"drm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL sink dereference in USB4 bandwidth functions\n\nallocate_usb4_bandwidth_for_stream() and allocate_usb4_bandwidth() both\nuse ASSERT(stream->sink) before dereferencing stream->sink->link. ASSERT\nis compiled out in production builds, so a NULL stream->sink causes a\nNULL pointer dereference.\n\nlink_set_dpms_off() already guards two earlier accesses to stream->sink\nwith explicit NULL checks, confirming that stream->sink can legitimately\nbe NULL. The subsequent call to deallocate_usb4_bandwidth() had no\nequivalent guard.\n\nReplace the ASSERT() calls with proper NULL checks that return false\nearly, and add a matching stream->sink guard at the call site in\nlink_set_dpms_off() consistent with the surrounding pattern.\n\nv2: Keep the existing ASSERT() calls for diagnostics (to report\n    unexpected NULL sink), and add explicit NULL checks that return false\n    before dereferencing stream->sink. Also add a matching stream->sink\n    guard at the deallocation call site in link_set_dpms_off(). (Alex)\n\n(cherry picked from commit 98029a0ce61feb52c563f65349dd9b25f672e355)","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99151","source_modified_at":"2026-10-28T10:35:06.866Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"Linux","vendor":"Linux","versions":[{"version":"0b1eebd359685dd681f6e0df5540a5bb985a27bf","lessThan":"4c8b5e5b9776ad08138d79b14238c5742b32911b","status":"affected","versionType":"git"},{"version":"8fa813b7fd1eccbed13e126166cf764f1f11a7d3","lessThan":"55a67aa89342545b89f469dea6f29bfb6fac6f3d","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99151","source_modified_at":"2026-10-28T10:35:06.866Z","fetched_at":"2026-10-28T15:55:58.673066Z","product":"Linux","vendor":"Linux","versions":[{"version":"7.2.9","lessThan":"7.2.13","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99151","source_modified_at":"2026-10-28T10:35:06.866Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"4c8b5e5b9776ad08138d79b14238c5742b32911b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99151","source_modified_at":"2026-10-28T10:35:06.866Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"55a67aa89342545b89f469dea6f29bfb6fac6f3d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99151","source_modified_at":"2026-10-28T10:35:06.866Z","fetched_at":"2026-10-28T15:55:58.673066Z","package":{"name":"Linux","ecosystem":null},"version":"7.2.13","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T10:35:06.866Z","modified_at":"2026-10-28T10:35:06.866Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99151","fetched_at":"2026-10-28T15:55:58.673066Z","source_modified_at":"2026-10-28T10:35:06.866Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/4c8b5e5b9776ad08138d79b14238c5742b32911b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/55a67aa89342545b89f469dea6f29bfb6fac6f3d"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-28T10:35:06.866Z","content_hash":"373924992d627e9ce56fc1a8c4a503ed1d7a7fe08929ee807a3647d3e4905ca1"}}