CVE-2023-1872: Use-after-free in Linux kernel's io_uring subsystem
First published: Wed Apr 12 2023(Updated: )
A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation. The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <5.17 | |
| Linux Kernel | >=5.7<5.17 | |
| Debian Linux | =10.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.25-1 6.12.27-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=08681391b84da27133deefaaddefd0acfa90c2be
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=da24142b1ef9fd5d36b76e36bab328a5b27523e8
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://security.netapp.com/advisory/ntap-20230601-0002/
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=08681391b84da27133deefaaddefd0acfa90c2be
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=da24142b1ef9fd5d36b76e36bab328a5b27523e8
- https://launchpad.net/bugs/cve/CVE-2023-1872
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1872
- https://nvd.nist.gov/vuln/detail/CVE-2023-1872
- https://security-tracker.debian.org/tracker/CVE-2023-1872
- https://ubuntu.com/security/CVE-2023-1872
Frequently Asked Questions
What is the severity of CVE-2023-1872?
CVE-2023-1872 has a high severity rating due to its potential for local privilege escalation.
How do I fix CVE-2023-1872?
To fix CVE-2023-1872, upgrade the Linux Kernel to versions 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.11-1, or 6.12.12-1.
Which Linux Kernel versions are vulnerable to CVE-2023-1872?
The vulnerable Linux Kernel versions are from 5.7 up to but not including 5.17.
What is a use-after-free vulnerability in CVE-2023-1872?
A use-after-free vulnerability occurs when a program continues to use a pointer after the memory it points to has been released, potentially allowing for privilege escalation.
Which distributions are affected by CVE-2023-1872?
Debian 10.0 and any Linux Kernel versions from 5.7 to 5.17 are affected by CVE-2023-1872.
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/weakness
- agent/author
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/severity
- collector/usn-cve
- source/Ubuntu
- agent/remedy
- agent/references
- agent/first-publish-date
- agent/trending
- agent/source
- agent/last-modified-date
- agent/description
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/event
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-cve
- agent/softwarecombine
- agent/tags
- collector/security-tracker-debian
- source/Debian
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.7
- vendor/debian
- canonical/debian linux
- version/debian linux/10.0
- package-manager/debian