{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98623", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.360Z", "datePublished": "2026-10-18T15:19:44.744Z", "dateUpdated": "2026-10-19T09:22:51.359Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:22:51.359Z"}, "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]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"], "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"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/nouveau/nvkm/subdev/clk/base.c"], "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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

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{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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]"}], "id": "CVE-2026-98623", "lastModified": "2026-10-19T10:19:26.460", "metrics": {}, "published": "2026-10-18T16:17:15.237", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update", "id": "2554926", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554926"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update\nIf list_for_each_entry() exits without hitting a break then \"pstate\" is\nnot a valid pstate pointer. Introduce a \"found\" variable instead.\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[Francesco: rebased on drm-misc-next, expanded the commit message]", "A flaw was found in the Linux kernel's Nouveau driver. A local user can trigger an out-of-bounds read by requesting an invalid clock performance state through the debugfs interface. This issue can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98623", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98623\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98623\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98623.mbox"], "threat_severity": "Moderate"}