CVE-2026-80857
Dashboard / Vulnerabilities / CVE-2026-80857
Summary: fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
Details: In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free The abort_on_kill path in request_wait_answer() calls fuse_abort_conn() and returns without waiting for FR_FINISHED. If fuse_dev_do_write() is concurrently processing the same request (FR_LOCKED set), the caller frees req->args while it is still being accessed, causing a use-after-free. Fix this by jumping to the existing wait_event(FR_FINISHED) instead of returning early. The wait will not hang because fuse_abort_conn() ensures all requests are ended.
References: https://git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e, https://git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a, https://git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80857.json, https://nvd.nist.gov/vuln/detail/CVE-2026-80857, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
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Type: GIT
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