CVE-2023-3389
High
Description
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).
SeverityHigh
CVSS7.8
Exploit probability52. percentile0.7%
Product
Linux Kernel
PublishedJun 28, 2023
First seenJun 28, 2023
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel5.10.185, 6.4 or later
Patches
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.10.162 ≤ v < 5.10.185, 5.13 ≤ v < 6.4 | 5.10.185, 6.4 |
| canonical ubuntu_linux | 14.04, 16.04, 18.04, 20.04, 22.04 | — |
| debian debian_linux | 10.0, 11.0 | — |
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