{"schema":"threatline.record/2","record":{"id":"CVE-2026-98623","aliases":[],"summary":"drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update\n\nIf list_for_each_entry() exits without hitting a break then \"pstate\" is\nnot a valid pstate pointer.  Introduce a \"found\" variable instead.\n\nThe check is reachable from userspace: nvkm_clk_ustate_update() takes the\npstate id straight from the 'pstate' debugfs file, so requesting an id\nthat is not in clk->states - or any id at all when the perf tables are\nbroken and the list is empty - makes the pstate->pstate != req test\ndereference the list head cast to a struct nvkm_pstate, which is an\nout-of-bounds read.\n\n[Francesco: rebased on drm-misc-next, expanded the commit message]","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"db5dd9f47b4df1be322f498d846e9a82940a7390","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"9d550924961f61a491dd95359c63494fa8a23d9f","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"492e9cfa12f35f7946ea1b78a19f1f9337d62248","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"a867abcfa85ab487066c3d3008a1ba905da04113","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"5315c7bacfe274ddfe649d9556e9a341ffa812da","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"0d096a7f7d79207490858dde731b16da5337e90c","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"391517da7fd54ae40e4a7fe1cc696217343b0061","status":"affected","versionType":"git"},{"version":"7c856522069755ab9d163a24ac332cd3cb35fe30","lessThan":"aff09d9e37e02dc60bde79035ac15b136d602259","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.13","status":"affected"},{"version":"0","lessThan":"3.13","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9d550924961f61a491dd95359c63494fa8a23d9f","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"492e9cfa12f35f7946ea1b78a19f1f9337d62248","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5315c7bacfe274ddfe649d9556e9a341ffa812da","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0d096a7f7d79207490858dde731b16da5337e90c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","source_modified_at":"2026-10-19T09:22:51.359Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"391517da7fd54ae40e4a7fe1cc696217343b0061","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.0684,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:19:44.744Z","modified_at":"2026-10-19T09:22:51.359Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:22:51.359Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98623","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259"}],"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":"2026-10-19T09:22:51.359Z","content_hash":"c27bac574acf91f7441ca2bdb3619ec586ac43557dd3708c63b53949be103423"}}