CVE-2023-3389: Use after free in io_uring in the Linux Kernel
First published: Wed Jun 28 2023(Updated: )
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).
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.10.162<5.10.185 | |
| Linux Kernel | >=5.13<6.4 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.13-1 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 | |
| Ubuntu | =22.04 | |
| Debian | =10.0 | |
| Debian | =11.0 |
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Reference Links
- http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59
- https://kernel.dance/0e388fce7aec40992eadee654193cad345d62663
- https://kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04
- https://kernel.dance/ef7dfac51d8ed961b742218f526bd589f3900a59
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://security.netapp.com/advisory/ntap-20230731-0001/
- https://www.debian.org/security/2023/dsa-5480
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663
- https://launchpad.net/bugs/cve/CVE-2023-3389
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3389
- https://nvd.nist.gov/vuln/detail/CVE-2023-3389
- https://security-tracker.debian.org/tracker/CVE-2023-3389
- https://ubuntu.com/security/CVE-2023-3389
- https://git.kernel.org/linus/9ca9fb24d5febccea354089c41f96a8ad0d853f8
Frequently Asked Questions
What is the severity of CVE-2023-3389?
CVE-2023-3389 has a high severity rating due to its potential for local privilege escalation.
How do I fix CVE-2023-3389?
To address CVE-2023-3389, upgrade your Linux kernel to a version that includes the security fixes, such as 5.10.223-1 or 6.12.12-1.
Which Linux distributions are affected by CVE-2023-3389?
CVE-2023-3389 affects several distributions including multiple versions of Ubuntu and Debian Linux.
What causes the vulnerability CVE-2023-3389?
CVE-2023-3389 is caused by a use-after-free condition in the Linux Kernel io_uring subsystem when racing cancel poll requests.
What versions of the Linux Kernel are vulnerable to CVE-2023-3389?
Versions from 5.10.162 to 5.10.185 and from 5.13 to 6.4 of the Linux Kernel are vulnerable to CVE-2023-3389.
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