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CVE-2026-89553 (GCVE-0-2026-89553)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-14 12:00
VLAI
Title
nouveau/gem: reserve the bo in the info ioctl around the vma lookup
Summary
In the Linux kernel, the following vulnerability has been resolved: nouveau/gem: reserve the bo in the info ioctl around the vma lookup In the non-uvmm path, there could be a race between the info lookup finding the vma, and the gem close path closing the vma leading to a use-after-free. Spotted with the help of Opus 4.6.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e758a3111914af7ee4351be86f1ac0efe87ed06e , < e05c28bd6043d0fd0bea9c3fc49300a8871a1a81 (git)
Affected: e758a3111914af7ee4351be86f1ac0efe87ed06e , < 208867763843aa82efcbe3b771f1b8e6c7aa820a (git)
Affected: e758a3111914af7ee4351be86f1ac0efe87ed06e , < ff110e85837d7ecd83f36078107be240ff5ae409 (git)
Affected: e758a3111914af7ee4351be86f1ac0efe87ed06e , < e60466011ac3a6b8045e6cc3c2cbb30d58039d2e (git)
Affected: e758a3111914af7ee4351be86f1ac0efe87ed06e , < 5e17160d41d92823f3379c1982e1369680c5ce4d (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.1
Unaffected: 0 , < 3.1 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_gem.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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              "versionType": "git"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.1"
            },
            {
              "lessThan": "3.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "3.1",
                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnouveau/gem: reserve the bo in the info ioctl around the vma lookup\n\nIn the non-uvmm path, there could be a race between the info lookup\nfinding the vma, and the gem close path closing the vma leading\nto a use-after-free.\n\nSpotted with the help of Opus 4.6."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Reached only via local DRM ioctls on a nouveau render node (/dev/dri/renderD*): DRM_IOCTL_NOUVEAU_GEM_INFO (nouveau_gem_ioctl_info\u2192nouveau_gem_info) racing DRM_IOCTL_GEM_CLOSE (nouveau_gem_object_close). Not reachable from network protocols, adjacent radios, or physical buses.\nAC:L - The attacker controls both sides of the race with threads that GEM_INFO and GEM_CLOSE the same handle, so close kfree()s the nouveau_vma while info still uses it. Skipping UVMM (legacy GEM_NEW) selects the vulnerable path; no victim timing or rare config is required.\nPR:L - NOUVEAU_GEM_INFO and GEM_CLOSE are DRM_RENDER_ALLOW with no DRM_ROOT_ONLY or capability checks. Any unprivileged local user who can open the nouveau render node (typical render/video group or uaccess ACL) can trigger it without init-namespace root.\nUI:N - Exploitation needs only the attacker opening their own DRM client, creating a GEM BO, and racing GEM_INFO against GEM_CLOSE on that handle; no separate victim action is required.\nS:U - The use-after-free corrupts kernel heap state (struct nouveau_vma) inside the host nouveau driver. Impact stays in the same kernel authority; this is not a VM escape or IOMMU/DMA isolation bypass.\nC:H - Use-after-free of struct nouveau_vma lets GEM_INFO read vma-\u003eaddr after kfree, and concurrent walks of nvbo-\u003evma_list can follow attacker-reused slab objects, enabling kernel memory disclosure as with other UAFs.\nI:H - UAF of the VMA plus concurrent list_del/list_del_init on nvbo-\u003evma_list enables heap spraying and list-pointer corruption, supporting arbitrary kernel writes and control-flow hijack as with other kernel UAFs.\nA:H - Dereferencing a freed nouveau_vma in GEM_INFO or walking a concurrently deleted vma_list causes a kernel oops/panic; the attacker can repeat the race to crash or hang the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:55.789Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e05c28bd6043d0fd0bea9c3fc49300a8871a1a81"
        },
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          "url": "https://git.kernel.org/stable/c/208867763843aa82efcbe3b771f1b8e6c7aa820a"
        },
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          "url": "https://git.kernel.org/stable/c/ff110e85837d7ecd83f36078107be240ff5ae409"
        },
        {
          "url": "https://git.kernel.org/stable/c/e60466011ac3a6b8045e6cc3c2cbb30d58039d2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e17160d41d92823f3379c1982e1369680c5ce4d"
        }
      ],
      "title": "nouveau/gem: reserve the bo in the info ioctl around the vma lookup",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89553",
    "datePublished": "2026-09-11T19:44:26.836Z",
    "dateReserved": "2026-09-11T19:38:34.723Z",
    "dateUpdated": "2026-09-14T12:00:55.789Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-15",
      "epss": "0.00134",
      "percentile": "0.03255"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-14T19:34:25+00:00",
      "cve": "CVE-2026-89553",
      "id": "CVE-2026-89553",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nouveau/gem: reserve the bo in the info ioctl around the vma lookup",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89553.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-12T16:26:10Z",
      "cve": "CVE-2026-89553",
      "id": "CVE-2026-89553",
      "initial_release_date": "2026-09-12T16:26:10Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89553",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89553.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.