{"id":"CVE-2026-64265","title":"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 …","summary":"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 …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","published":"2026-07-25","updated":"2026-07-27","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64265","references":[{"url":"https://git.kernel.org/stable/c/1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7366e6f4d2b4c7002b13fb01219e83679dad4127","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/893479015cb6442fd389d3b553ab3036c9541715","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8fce75fedf73ac72aa09163deb8f4291fdcaad2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64265.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-64265"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2507041"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64265"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64265"},{"url":"https://lore.kernel.org/linux-cve-announce/2026072558-CVE-2026-64265-5f6c@gregkh/T"},{"url":"https://access.redhat.com/errata/RHSA-2026:64775"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00163,"epssPercentile":0.05929,"ingestedAt":"2026-07-27T06:16:49.670Z","vendor":"Red Hat","product":"Red Hat Enterprise Linux BaseOS (v. 10)","affected":["enterprise_linux_appstream_v_10","enterprise_linux_baseos_v_10","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_real_time_for_nfv_v_10","enterprise_linux_real_time_v_10"],"patched":["enterprise_linux_appstream_v_10","enterprise_linux_baseos_v_10","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_real_time_for_nfv_v_10","enterprise_linux_real_time_v_10"],"cwe":["CWE-825"],"slug":"CVE-2026-64265","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:64775** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64775)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}