GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-53311 (GCVE-0-2026-53311)

Vulnerability from cvelistv5 – Published: 2026-06-26 19:41 – Updated: 2026-06-26 19:41
VLAI
Title
fuse: fix uninit-value in fuse_dentry_revalidate()
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 [...] =====================================================
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2396356a945bb022aff02656f59c2a45d457043f , < da3d241c5b925f17a9d8051d7a9e0d454d8e01f6 (git)
Affected: 2396356a945bb022aff02656f59c2a45d457043f , < 3ac9117ba3deab8a5dd22847355f861686f4bee7 (git)
Affected: 2396356a945bb022aff02656f59c2a45d457043f , < 5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53311",
      "date": "2026-09-16",
      "epss": "0.00112",
      "percentile": "0.01585"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53311\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-26T20:17:24.423\",\"lastModified\":\"2026-07-06T20:14:07.843\",\"vulnStatus\":\"Analyzed\",\"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=====================================================\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/fuse/dir.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2396356a945bb022aff02656f59c2a45d457043f\",\"lessThan\":\"da3d241c5b925f17a9d8051d7a9e0d454d8e01f6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2396356a945bb022aff02656f59c2a45d457043f\",\"lessThan\":\"3ac9117ba3deab8a5dd22847355f861686f4bee7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2396356a945bb022aff02656f59c2a45d457043f\",\"lessThan\":\"5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/fuse/dir.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.16\",\"versionEndExcluding\":\"6.18.34\",\"matchCriteriaId\":\"2437F48D-051C-4E78-83C2-F198D0F2AE92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.10\",\"matchCriteriaId\":\"A13475D2-59BF-4716-94B5-7C1D239A2CF4\"}]}]}],\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-06T20:44:39+00:00",
      "cve": "CVE-2026-53311",
      "id": "CVE-2026-53311",
      "initial_release_date": "2026-06-26T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fuse: fix uninit-value in fuse_dentry_revalidate()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53311.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-01T03:16:05Z",
      "cve": "CVE-2026-53311",
      "id": "CVE-2026-53311",
      "initial_release_date": "2026-06-28T01:08:43Z",
      "product_status:known_not_affected": "291",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53311",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53311.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.