Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.7, < 5.17 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linuxMailing ListProduct
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linuxMailing ListPatch
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20230601-0002/Third Party Advisory
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linuxMailing ListProduct
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linuxMailing ListPatch
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20230601-0002/Third Party Advisory
FAQ
What is CVE-2023-1872?
CVE-2023-1872 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 c...
How severe is CVE-2023-1872?
CVE-2023-1872 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-1872?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.