CVE-2026-53311 (GCVE-0-2026-53311)
Vulnerability from cvelistv5
Published
2026-06-26 19:41
Modified
2026-06-26 19:41
Severity ?
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
Impacted products
Vendor Product Version
Linux Linux Version: 2396356a945bb022aff02656f59c2a45d457043f
Version: 2396356a945bb022aff02656f59c2a45d457043f
Version: 2396356a945bb022aff02656f59c2a45d457043f
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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====================================================="
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-26T19:41:04.890Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/da3d241c5b925f17a9d8051d7a9e0d454d8e01f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ac9117ba3deab8a5dd22847355f861686f4bee7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd"
        }
      ],
      "title": "fuse: fix uninit-value in fuse_dentry_revalidate()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53311",
    "datePublished": "2026-06-26T19:41:04.890Z",
    "dateReserved": "2026-06-09T07:44:35.397Z",
    "dateUpdated": "2026-06-26T19:41:04.890Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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