{"api_version":"1","generated_at":"2026-10-22T17:45:18+00:00","cve":"CVE-2026-98623","urls":{"html":"https://cve.report/CVE-2026-98623","api":"https://cve.report/api/cve/CVE-2026-98623.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98623","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98623"},"summary":{"title":"drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update","description":"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]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:15","updated_at":"2026-10-19 10:19:26"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390","name":"https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c","name":"https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061","name":"https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248","name":"https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da","name":"https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259","name":"https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113","name":"https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f","name":"https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98623","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98623","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7c856522069755ab9d163a24ac332cd3cb35fe30 db5dd9f47b4df1be322f498d846e9a82940a7390 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7c856522069755ab9d163a24ac332cd3cb35fe30 9d550924961f61a491dd95359c63494fa8a23d9f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7c856522069755ab9d163a24ac332cd3cb35fe30 492e9cfa12f35f7946ea1b78a19f1f9337d62248 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7c856522069755ab9d163a24ac332cd3cb35fe30 a867abcfa85ab487066c3d3008a1ba905da04113 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"db5dd9f47b4df1be322f498d846e9a82940a7390","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"9d550924961f61a491dd95359c63494fa8a23d9f","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"492e9cfa12f35f7946ea1b78a19f1f9337d62248","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"a867abcfa85ab487066c3d3008a1ba905da04113","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"5315c7bacfe274ddfe649d9556e9a341ffa812da","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"0d096a7f7d79207490858dde731b16da5337e90c","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"391517da7fd54ae40e4a7fe1cc696217343b0061","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"},{"lessThan":"aff09d9e37e02dc60bde79035ac15b136d602259","status":"affected","version":"7c856522069755ab9d163a24ac332cd3cb35fe30","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.13"},{"lessThan":"3.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"3.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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]"}],"providerMetadata":{"dateUpdated":"2026-10-19T09:22:51.359Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390"},{"url":"https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f"},{"url":"https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248"},{"url":"https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113"},{"url":"https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da"},{"url":"https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c"},{"url":"https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061"},{"url":"https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259"}],"title":"drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98623","datePublished":"2026-10-18T15:19:44.744Z","dateReserved":"2026-09-25T10:25:14.360Z","dateUpdated":"2026-10-19T09:22:51.359Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:15","lastModifiedDate":"2026-10-19 10:19:26","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98623","Ordinal":"1","Title":"drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_usta","CVE":"CVE-2026-98623","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98623","Ordinal":"1","NoteData":"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]","Type":"Description","Title":"drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_usta"}]}}}