CVE-2022-3176
Use-after-free in io_uring in Linux Kernel
- State
- Published
- Severity
- 7.8 High
- Published
- Sep 16, 2022
- Updated
- Apr 21, 2025
- Reserved
- Sep 12, 2022
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
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
KernelLinux |
|
References
- https://kernel.dance/#fc78b2fc21f10c4c9c4d5d659a685710ffa63659
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?h=linux-5.4.y&id=fc78b2fc21f10c4c9c4d5d659a685710ffa63659
- DSA-5257vendor-advisory
- [debian-lts-announce] 20221101 [SECURITY] [DLA 3173-1] linux-5.10 security updatemailing-list
- https://security.netapp.com/advisory/ntap-20230216-0003/
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