CVE-2025-68805 (GCVE-0-2025-68805)
Vulnerability from cvelistv5
Published
2026-01-13 15:29
Modified
2026-08-05 12:11
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fuse: fix io-uring list corruption for terminated non-committed requests When a request is terminated before it has been committed, the request is not removed from the queue's list. This leaves a dangling list entry that leads to list corruption and use-after-free issues. Remove the request from the queue's list for terminated non-committed requests.
References
Impacted products
Vendor Product Version
Linux Linux Version: c090c8abae4b6b77a1bee116aa6c385456ebef96
Version: c090c8abae4b6b77a1bee116aa6c385456ebef96
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev_uring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a6d1f1ace16d0e777a85f84267160052d3499b6e",
              "status": "affected",
              "version": "c090c8abae4b6b77a1bee116aa6c385456ebef96",
              "versionType": "git"
            },
            {
              "lessThan": "95c39eef7c2b666026c69ab5b30471da94ea2874",
              "status": "affected",
              "version": "c090c8abae4b6b77a1bee116aa6c385456ebef96",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/fuse/dev_uring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix io-uring list corruption for terminated non-committed requests\n\nWhen a request is terminated before it has been committed, the request\nis not removed from the queue\u0027s list. This leaves a dangling list entry\nthat leads to list corruption and use-after-free issues.\n\nRemove the request from the queue\u0027s list for terminated non-committed\nrequests."
        }
      ],
      "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 - The vulnerability is reached through local FUSE filesystem operations and io_uring commands on a connected /dev/fuse descriptor; no remote protocol reaches this path.\nAC:L - Once FUSE-over-io_uring is enabled, a malicious daemon controls buffer validity, request generation, and commit IDs, allowing it to trigger the dangling entry without winning an uncontrolled race.\nPR:L - FUSE supports user-namespace mounts, and namespace CAP_SYS_ADMIN is sufficient where /dev/fuse is accessible. No capability in the initial user namespace is required.\nUI:N - The attacker can create and operate the FUSE mount, invalidate the registered buffers, and submit subsequent commands without action by another user.\nS:U - Exploitation compromises the host kernel, which is the same security authority in which the vulnerable code executes.\nC:H - The dangling processing-list entry produces a kernel use-after-free whose reclaimed object can be manipulated to disclose arbitrary kernel memory.\nI:H - Deleting or moving the stale list node performs writes through freed or attacker-influenced list pointers, enabling kernel heap corruption and potential control-flow hijacking.\nA:H - The corrupted list and freed request can cause invalid kernel accesses, infinite traversal under a spinlock, an oops, or a kernel panic."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:11:37.322Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a6d1f1ace16d0e777a85f84267160052d3499b6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/95c39eef7c2b666026c69ab5b30471da94ea2874"
        }
      ],
      "title": "fuse: fix io-uring list corruption for terminated non-committed requests",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68805",
    "datePublished": "2026-01-13T15:29:13.119Z",
    "dateReserved": "2025-12-24T10:30:51.045Z",
    "dateUpdated": "2026-08-05T12:11:37.322Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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