FKIE_CVE-2026-53311

Vulnerability from fkie_nvd - Published: 2026-06-26 20:17 - Updated: 2026-07-06 20:14
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fuse: fix uninit-value in fuse_dentry_revalidate() fuse_dentry_revalidate() may be called with a dentry that didn't had ->d_time initialised. The issue was found with KMSAN, where lookup_open() calls __d_alloc(), followed by d_revalidate(), as shown below: ===================================================== BUG: KMSAN: uninit-value in fuse_dentry_revalidate+0x150/0x13d0 fs/fuse/dir.c:394 fuse_dentry_revalidate+0x150/0x13d0 fs/fuse/dir.c:394 d_revalidate fs/namei.c:1030 [inline] lookup_open fs/namei.c:4405 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1614/0x64c0 fs/namei.c:4827 do_file_open+0x2aa/0x680 fs/namei.c:4859 [...] Uninit was created at: slab_post_alloc_hook mm/slub.c:4466 [inline] slab_alloc_node mm/slub.c:4788 [inline] kmem_cache_alloc_lru_noprof+0x382/0x1280 mm/slub.c:4807 __d_alloc+0x55/0xa00 fs/dcache.c:1740 d_alloc_parallel+0x99/0x2740 fs/dcache.c:2604 lookup_open fs/namei.c:4398 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x135f/0x64c0 fs/namei.c:4827 do_file_open+0x2aa/0x680 fs/namei.c:4859 [...] =====================================================
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ac9117ba3deab8a5dd22847355f861686f4bee7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a6baf204610589f8a5b5a1cd69d1fe661d9d3cdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da3d241c5b925f17a9d8051d7a9e0d454d8e01f6Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dir.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "da3d241c5b925f17a9d8051d7a9e0d454d8e01f6",
              "status": "affected",
              "version": "2396356a945bb022aff02656f59c2a45d457043f",
              "versionType": "git"
            },
            {
              "lessThan": "3ac9117ba3deab8a5dd22847355f861686f4bee7",
              "status": "affected",
              "version": "2396356a945bb022aff02656f59c2a45d457043f",
              "versionType": "git"
            },
            {
              "lessThan": "5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd",
              "status": "affected",
              "version": "2396356a945bb022aff02656f59c2a45d457043f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dir.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2437F48D-051C-4E78-83C2-F198D0F2AE92",
              "versionEndExcluding": "6.18.34",
              "versionStartIncluding": "6.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A13475D2-59BF-4716-94B5-7C1D239A2CF4",
              "versionEndExcluding": "7.0.10",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix uninit-value in fuse_dentry_revalidate()\n\nfuse_dentry_revalidate() may be called with a dentry that didn\u0027t had\n-\u003ed_time initialised.  The issue was found with KMSAN, where lookup_open()\ncalls __d_alloc(), followed by d_revalidate(), as shown below:\n\n=====================================================\nBUG: KMSAN: uninit-value in fuse_dentry_revalidate+0x150/0x13d0 fs/fuse/dir.c:394\n fuse_dentry_revalidate+0x150/0x13d0 fs/fuse/dir.c:394\n d_revalidate fs/namei.c:1030 [inline]\n lookup_open fs/namei.c:4405 [inline]\n open_last_lookups fs/namei.c:4583 [inline]\n path_openat+0x1614/0x64c0 fs/namei.c:4827\n do_file_open+0x2aa/0x680 fs/namei.c:4859\n[...]\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:4466 [inline]\n slab_alloc_node mm/slub.c:4788 [inline]\n kmem_cache_alloc_lru_noprof+0x382/0x1280 mm/slub.c:4807\n __d_alloc+0x55/0xa00 fs/dcache.c:1740\n d_alloc_parallel+0x99/0x2740 fs/dcache.c:2604\n lookup_open fs/namei.c:4398 [inline]\n open_last_lookups fs/namei.c:4583 [inline]\n path_openat+0x135f/0x64c0 fs/namei.c:4827\n do_file_open+0x2aa/0x680 fs/namei.c:4859\n[...]\n====================================================="
    }
  ],
  "id": "CVE-2026-53311",
  "lastModified": "2026-07-06T20:14:07.843",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-06-26T20:17:24.423",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3ac9117ba3deab8a5dd22847355f861686f4bee7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/da3d241c5b925f17a9d8051d7a9e0d454d8e01f6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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