CVE-2022-3176
Last modified
CVE-2022-3176 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.1, < 5.4.212 |
| Linux | Linux Kernel | >= 5.5, < 5.10.141 |
| Linux | Linux Kernel | >= 5.11, < 5.15.65 |
| Linux | Linux Kernel | >= 5.16, < 5.17 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
References
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?h=linux-5.4.y&id=fc78b2fc21f10c4c9c4d5d659a685710ffa63659Mailing List, Patch, Vendor Advisory
- https://kernel.dance/#fc78b2fc21f10c4c9c4d5d659a685710ffa63659Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230216-0003/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5257Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?h=linux-5.4.y&id=fc78b2fc21f10c4c9c4d5d659a685710ffa63659Mailing List, Patch, Vendor Advisory
- https://kernel.dance/#fc78b2fc21f10c4c9c4d5d659a685710ffa63659Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230216-0003/Third Party Advisory
- https://www.debian.org/security/2022/dsa-5257Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- 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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