{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b88baab828713ce0b49b185444b2ee83bed373a8"
            },
            {
              "fixed": "ba42d8a1c2c7629c61914df11a7d63ac77449ffb"
            },
            {
              "fixed": "88114e3a96582882e63b2f73aa7a5a9cf0d5073c"
            },
            {
              "fixed": "24c25b182d17d1bdfde0088c96bdf6f93e8f46bc"
            },
            {
              "fixed": "4083d24c2636fde7b18076115af52820d203bc57"
            },
            {
              "fixed": "ccf930812f23b8259ef64fd3394d53b093e4651a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.6.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89801.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/uvmm: fix premature region free on failed OP_UNMAP_SPARSE\n\nIn nouveau_uvmm_bind_job_submit()'s OP_UNMAP_SPARSE arm, op-\u003ereg is set\nfrom nouveau_uvma_region_find(), which only looks the region up and takes\nno reference; a region's sole reference is its membership in\nuvmm-\u003eregion_mt. Two failure paths leave op-\u003ereg set: the -ENOENT check\nwhen the region is busy, and the drm_gpuvm_sm_unmap_ops_create() failure.\nThe sibling nouveau_uvmm_sm_unmap_prepare() failure just below clears\nop-\u003ereg; these two do not.\n\nunwind_continue steps back one op, so the failing op is skipped by the\nunwind loop and its op-\u003ereg stays set. nouveau_uvmm_bind_job_cleanup()\nthen enters its if (op-\u003ereg) branch and calls nouveau_uvma_region_remove()\nand nouveau_uvma_region_put() on it, dropping the tree's sole reference\nand freeing a region this job never created. The comment above the\ncleanup loop documents the broken invariant: op-\u003ereg must be NULL on\nsubmit failure.\n\nThis frees a live region on an unrelated failure, reachable single-job\nwhen drm_gpuvm_sm_unmap_ops_create() returns -ENOMEM; if another job owns\nthe same region, its cleanup then removes and puts the freed region, a\nuse-after-free. Clear op-\u003ereg on both failure paths.",
  "id": "CVE-2026-89801",
  "modified": "2026-09-18T03:30:44.775831026Z",
  "published": "2026-09-16T10:30:34.458Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24c25b182d17d1bdfde0088c96bdf6f93e8f46bc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4083d24c2636fde7b18076115af52820d203bc57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88114e3a96582882e63b2f73aa7a5a9cf0d5073c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba42d8a1c2c7629c61914df11a7d63ac77449ffb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccf930812f23b8259ef64fd3394d53b093e4651a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89801.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89801"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "drm/nouveau/uvmm: fix premature region free on failed OP_UNMAP_SPARSE"
}