CVE-2026-89800 (GCVE-0-2026-89800)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:30 – Updated: 2026-09-16 10:30
VLAI
Title
drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE A successful OP_UNMAP_SPARSE marks its region dirty with nouveau_uvma_region_dirty() and defers the teardown to nouveau_uvmm_bind_job_cleanup(); it does not remove the region from uvmm->region_mt. If a later op in the job fails, the unwind path never clears reg->dirty (set in one place, cleared nowhere) and sets op->reg = NULL, so cleanup skips the teardown. The region is left in the tree with dirty set and its completion never signalled. Later binds over that range then fail permanently -- -ENOENT or -EINVAL from the dirty checks, or an unkillable wait_for_completion() in bind_validate_region() -- for the lifetime of the uvmm. Clear reg->dirty when the unwind reverts the sparse unmap, restoring the region to the state it was found in.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < a129b2b875c148aba233ace8447a0c36ca3bae07 (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < 196ce9e5e93202da097062be24e404984dbc5ac2 (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < 1101cbfe7f342e5eaaf7444965d4f1215abdac4c (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < c60033c172420179b7bbb3d1f843f8dc90164dc5 (git)
Affected: b88baab828713ce0b49b185444b2ee83bed373a8 , < 38a62306c4266bcb3cd89e33c7111ee33096ebb3 (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_uvmm.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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              "lessThan": "196ce9e5e93202da097062be24e404984dbc5ac2",
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_uvmm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
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            {
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              "version": "0",
              "versionType": "semver"
            },
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                },
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE\n\nA successful OP_UNMAP_SPARSE marks its region dirty with\nnouveau_uvma_region_dirty() and defers the teardown to\nnouveau_uvmm_bind_job_cleanup(); it does not remove the region from\nuvmm-\u003eregion_mt.\n\nIf a later op in the job fails, the unwind path never clears reg-\u003edirty\n(set in one place, cleared nowhere) and sets op-\u003ereg = NULL, so cleanup\nskips the teardown. The region is left in the tree with dirty set and its\ncompletion never signalled. Later binds over that range then fail\npermanently -- -ENOENT or -EINVAL from the dirty checks, or an unkillable\nwait_for_completion() in bind_validate_region() -- for the lifetime of\nthe uvmm.\n\nClear reg-\u003edirty when the unwind reverts the sparse unmap, restoring the\nregion to the state it was found in."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:30:33.097Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/a129b2b875c148aba233ace8447a0c36ca3bae07"
        },
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          "url": "https://git.kernel.org/stable/c/196ce9e5e93202da097062be24e404984dbc5ac2"
        },
        {
          "url": "https://git.kernel.org/stable/c/1101cbfe7f342e5eaaf7444965d4f1215abdac4c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c60033c172420179b7bbb3d1f843f8dc90164dc5"
        },
        {
          "url": "https://git.kernel.org/stable/c/38a62306c4266bcb3cd89e33c7111ee33096ebb3"
        }
      ],
      "title": "drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89800",
    "datePublished": "2026-09-16T10:30:33.097Z",
    "dateReserved": "2026-09-11T19:38:34.767Z",
    "dateUpdated": "2026-09-16T10:30:33.097Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-09-25",
      "epss": "0.002",
      "percentile": "0.08782"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-24T01:52:32.000Z",
      "cve": "CVE-2026-89800",
      "id": "msrc_CVE-2026-89800",
      "initial_release_date": "2026-09-17T01:12:27.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "drm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89800.json",
      "version": "4"
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    "nvd": {
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                "product": "Linux",
                "programFiles": [
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                ],
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau/uvmm: clear the dirty flag when unwinding an OP_UNMAP_SPARSE\n\nA successful OP_UNMAP_SPARSE marks its region dirty with\nnouveau_uvma_region_dirty() and defers the teardown to\nnouveau_uvmm_bind_job_cleanup(); it does not remove the region from\nuvmm-\u003eregion_mt.\n\nIf a later op in the job fails, the unwind path never clears reg-\u003edirty\n(set in one place, cleared nowhere) and sets op-\u003ereg = NULL, so cleanup\nskips the teardown. The region is left in the tree with dirty set and its\ncompletion never signalled. Later binds over that range then fail\npermanently -- -ENOENT or -EINVAL from the dirty checks, or an unkillable\nwait_for_completion() in bind_validate_region() -- for the lifetime of\nthe uvmm.\n\nClear reg-\u003edirty when the unwind reverts the sparse unmap, restoring the\nregion to the state it was found in."
          }
        ],
        "id": "CVE-2026-89800",
        "lastModified": "2026-09-16T11:16:44.877",
        "metrics": {},
        "published": "2026-09-16T11:16:44.877",
        "references": [
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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