{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7c856522069755ab9d163a24ac332cd3cb35fe30"
            },
            {
              "fixed": "db5dd9f47b4df1be322f498d846e9a82940a7390"
            },
            {
              "fixed": "9d550924961f61a491dd95359c63494fa8a23d9f"
            },
            {
              "fixed": "492e9cfa12f35f7946ea1b78a19f1f9337d62248"
            },
            {
              "fixed": "a867abcfa85ab487066c3d3008a1ba905da04113"
            },
            {
              "fixed": "5315c7bacfe274ddfe649d9556e9a341ffa812da"
            },
            {
              "fixed": "0d096a7f7d79207490858dde731b16da5337e90c"
            },
            {
              "fixed": "391517da7fd54ae40e4a7fe1cc696217343b0061"
            },
            {
              "fixed": "aff09d9e37e02dc60bde79035ac15b136d602259"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98623.json"
  },
  "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-\u003estates - or any id at all when the perf tables are\nbroken and the list is empty - makes the pstate-\u003epstate != 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",
  "modified": "2026-10-20T02:31:05.427213140Z",
  "published": "2026-10-18T15:19:44.744Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d096a7f7d79207490858dde731b16da5337e90c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/391517da7fd54ae40e4a7fe1cc696217343b0061"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/492e9cfa12f35f7946ea1b78a19f1f9337d62248"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5315c7bacfe274ddfe649d9556e9a341ffa812da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d550924961f61a491dd95359c63494fa8a23d9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a867abcfa85ab487066c3d3008a1ba905da04113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aff09d9e37e02dc60bde79035ac15b136d602259"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db5dd9f47b4df1be322f498d846e9a82940a7390"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98623.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98623"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update"
}