{"id":"CVE-2026-98623","revision":"b4a6cad9aac146a3ad788b165dd0a89e","records":[{"revision":"b4a6cad9aac146a3ad788b165dd0a89e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98623","aliases":[],"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":0,"publishedAt":"2026-10-18T15:19:44.744+00:00","modifiedAt":"2026-10-19T09:22:51.359+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"db5dd9f47b4df1be322f498d846e9a82940a7390\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"9d550924961f61a491dd95359c63494fa8a23d9f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"492e9cfa12f35f7946ea1b78a19f1f9337d62248\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"a867abcfa85ab487066c3d3008a1ba905da04113\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"5315c7bacfe274ddfe649d9556e9a341ffa812da\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"0d096a7f7d79207490858dde731b16da5337e90c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"391517da7fd54ae40e4a7fe1cc696217343b0061\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c856522069755ab9d163a24ac332cd3cb35fe30\",\n                            \"lessThan\": \"aff09d9e37e02dc60bde79035ac15b136d602259\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390","https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f","https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248","https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113","https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da","https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c","https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061","https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98623","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98623","identifiers":["CVE-2026-98623"]},"retained":false,"historicalAffected":[]}],"coverage":[]}