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CVE-2026-80857

UnknownEPSS 0.14%

Last modified

CVE-2026-80857 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.14%

4.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 0c7fca880a40a209a9c92be14143996d14b93ff6, < a8bbb2a60513bf322170903c21462f0bf4f62be2; >= 204aa22a686bfee48daca7db620c1e017615f2ff, < 715cb86e33cda43f5224cdc3fd5610c0b6a46f7a; >= 204aa22a686bfee48daca7db620c1e017615f2ff, < 64b0b5cacbd2fea88001464cb712c9dfc795b26e; 300e812b882a174dca675d8028684001ad5826bc; >= 6.18.25, < 6.18.50; >= 7.0.2, < 7.1
LinuxLinux7.1

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80857?
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.
How severe is CVE-2026-80857?
Severity scoring for CVE-2026-80857 is pending analysis. The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80857?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST