{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "760eac73f9f69aa28fcb3050b4946c2dcc656d12"
            },
            {
              "fixed": "1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c"
            },
            {
              "fixed": "7366e6f4d2b4c7002b13fb01219e83679dad4127"
            },
            {
              "fixed": "893479015cb6442fd389d3b553ab3036c9541715"
            },
            {
              "fixed": "f8fce75fedf73ac72aa09163deb8f4291fdcaad2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64265.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: clear intr_entry in fuse_resend and fuse_remove_pending_req\n\nWhen fuse_resend() moves a request from fpq-\u003eprocessing back to\nfiq-\u003epending, it sets FR_PENDING and clears FR_SENT but does not\nremove the requests intr_entry from fiq-\u003einterrupts.  If the\nrequest had FR_INTERRUPTED set from a prior signal, intr_entry\nremains dangling on fiq-\u003einterrupts.  When the requesting task\nthen receives a fatal signal, fuse_remove_pending_req() sees\nFR_PENDING=1, removes the request from fiq-\u003epending and frees it\nvia the refcount path, also without cleaning intr_entry.  The\nstale intr_entry causes use-after-free when fuse_read_interrupt()\niterates fiq-\u003einterrupts:\n  - list_del_init(\u0026req-\u003eintr_entry) -\u003e UAF write on freed slab\n  - req-\u003ein.h.unique -\u003e UAF read, data leaked to userspace\n\nRemove intr_entry from fiq-\u003einterrupts in fuse_resend() for\ninterrupted requests before they are placed back on fiq-\u003epending.\n\nAdd a WARN_ON if the intr_entry is not empty on request destruction.",
  "id": "CVE-2026-64265",
  "modified": "2026-08-18T03:31:29.334202656Z",
  "published": "2026-07-25T08:49:14.548Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64265.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64265"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req"
}