FKIE_CVE-2026-68271

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-17 05:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix reversed error cleanup order in ucopy functions nouveau_uvmm_vm_bind_ucopy() and nouveau_exec_ucopy() place their error cleanup labels in allocation order rather than reverse allocation order. On a u_memcpya() failure for in_sync.s, the goto to err_free_ops (or err_free_pushs) frees the first allocation and then falls through to err_free_ins, which calls u_free() on args->in_sync.s. Since args->in_sync.s still holds the ERR_PTR returned by the failed u_memcpya(), and ERR_PTR values are not caught by ZERO_OR_NULL_PTR(), kvfree() proceeds to dereference it, which can result in a kernel oops. A failure for out_sync.s instead jumps to err_free_ins and skips freeing the first allocation, leading to a memory leak. Fix by swapping the cleanup label order so resources are freed in the correct reverse allocation sequence.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_exec.c",
            "drivers/gpu/drm/nouveau/nouveau_uvmm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2473ac314387a5def7244eb6d6a345934ed140bf",
              "status": "affected",
              "version": "b88baab828713ce0b49b185444b2ee83bed373a8",
              "versionType": "git"
            },
            {
              "lessThan": "e15c25c7972d38a9f6bf8c3f7f29179a67263eba",
              "status": "affected",
              "version": "b88baab828713ce0b49b185444b2ee83bed373a8",
              "versionType": "git"
            },
            {
              "lessThan": "4e109faa9ea2b6c04cc5a99e76db3126575a59d1",
              "status": "affected",
              "version": "b88baab828713ce0b49b185444b2ee83bed373a8",
              "versionType": "git"
            },
            {
              "lessThan": "ebbaf64d2635d1e78196c067fa8fa582a7dc17f7",
              "status": "affected",
              "version": "b88baab828713ce0b49b185444b2ee83bed373a8",
              "versionType": "git"
            },
            {
              "lessThan": "ab99ead646b1b833ecd57fe577a2816f2e848167",
              "status": "affected",
              "version": "b88baab828713ce0b49b185444b2ee83bed373a8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_exec.c",
            "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"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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: fix reversed error cleanup order in ucopy functions\n\nnouveau_uvmm_vm_bind_ucopy() and nouveau_exec_ucopy() place their error\ncleanup labels in allocation order rather than reverse allocation order.\nOn a u_memcpya() failure for in_sync.s, the goto to err_free_ops (or\nerr_free_pushs) frees the first allocation and then falls through to\nerr_free_ins, which calls u_free() on args-\u003ein_sync.s.\n\nSince args-\u003ein_sync.s still holds the ERR_PTR returned by the failed\nu_memcpya(), and ERR_PTR values are not caught by ZERO_OR_NULL_PTR(),\nkvfree() proceeds to dereference it, which can result in a kernel oops.\nA failure for out_sync.s instead jumps to err_free_ins and skips freeing\nthe first allocation, leading to a memory leak.\n\nFix by swapping the cleanup label order so resources are freed in the\ncorrect reverse allocation sequence."
    }
  ],
  "id": "CVE-2026-68271",
  "lastModified": "2026-08-17T05:18:29.633",
  "metrics": {},
  "published": "2026-08-10T13:20:16.097",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2473ac314387a5def7244eb6d6a345934ed140bf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e109faa9ea2b6c04cc5a99e76db3126575a59d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ab99ead646b1b833ecd57fe577a2816f2e848167"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e15c25c7972d38a9f6bf8c3f7f29179a67263eba"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebbaf64d2635d1e78196c067fa8fa582a7dc17f7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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