{"id":"CVE-2026-64265","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-64265","generatedAt":"2026-10-28T11:54:41.201Z","title":"In the Linux kernel, the following vulnerability has been resolved: fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req When fuse_resend() moves a request from fpq->processing back to fiq->pending, it sets FR_PENDING and clears FR_SENT but…","description":"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->processing back to\nfiq->pending, it sets FR_PENDING and clears FR_SENT but does not\nremove the requests intr_entry from fiq->interrupts.  If the\nrequest had FR_INTERRUPTED set from a prior signal, intr_entry\nremains dangling on fiq->interrupts.  When the requesting task\nthen receives a fatal signal, fuse_remove_pending_req() sees\nFR_PENDING=1, removes the request from fiq->pending 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->interrupts:\n  - list_del_init(&req->intr_entry) -> UAF write on freed slab\n  - req->in.h.unique -> UAF read, data leaked to userspace\n\nRemove intr_entry from fiq->interrupts in fuse_resend() for\ninterrupted requests before they are placed back on fiq->pending.\n\nAdd a WARN_ON if the intr_entry is not empty on request destruction.","published":"2026-07-25T10:17:07.000Z","lastModified":"2026-08-17T05:17:25.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["linux/linux kernel"],"epss":{"score":0.00172,"percentile":0.06533,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64265","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}