CVE-2022-3910

Use After Free vulnerability in Linux Kernel allows Privilege Escalation. An improper Update of Reference Count in io_uring leads to Use-After-Free and Local Privilege Escalation. When io_msg_ring was invoked with a fixed file, it called io_fput_file() which improperly decreased its reference count (leading to Use-After-Free and Local Privilege Escalation). Fixed files are permanently registered to the ring, and should not be put separately. We recommend upgrading past commit https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679 https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679

• CWE-416

• https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
• https://kernel.dance/#fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
• https://github.com/torvalds/linux/commit/fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory
• https://kernel.dance/#fc7222c3a9f56271fba02aabbfbae999042f1679Patch, Third Party Advisory

Published

Nov 22, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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