Use After Free in Linux Kernel
CVE-2023-1872
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Linux Kernel — versions 5.7
- Linux Kernel
- Debian Linux — versions 10.0
Weakness classification (CWE)
References
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/ (Product, Mailing List)
- git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/ (Patch, Mailing List)
- lists.debian.org/debian-lts-announce/2023/05/msg00005.html (Third Party Advisory)
- security.netapp.com/advisory/ntap-20230601-0002/ (Third Party Advisory)
- packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095… (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-1872?
- CVE-2023-1872 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-04-12.
- How severe is CVE-2023-1872?
- High severity. CVSS v3 base score is 7.8 out of 10.