CVE-2022-3176

Description

There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659

Weakness classification

• cve-coordination@google.com: CWE-416
• nvd@nist.gov: CWE-416

Primary references

• cve-coordination@google.com — Mailing List, Patch, Vendor Advisory
• cve-coordination@google.com — Patch, Vendor Advisory
• cve-coordination@google.com — Mailing List, Third Party Advisory
• cve-coordination@google.com — Third Party Advisory
• cve-coordination@google.com — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory