CVE-2023-1249

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-23 · updated 2026-06-17
Weakness: CWE-416

Description

A use-after-free flaw was found in the Linux kernel’s core dump subsystem. This flaw allows a local user to crash the system. Only if patch 390031c94211 ("coredump: Use the vma snapshot in fill_files_note") not applied yet, then kernel could be affected.

Affected products

Linux kernel: before 5.18 — fixed in 5.18

How to fix

Upgrade to a fixed version: Linux kernel 5.18. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/171912/CentOS-Stream-9-Missing-Kernel-Security-Fix.html
https://patchwork.kernel.org/project/linux-fsdevel/patch/87iltzn3nd.fsf_-_%40email.froward.int.ebiederm.org/
http://packetstormsecurity.com/files/171912/CentOS-Stream-9-Missing-Kernel-Security-Fix.html
https://patchwork.kernel.org/project/linux-fsdevel/patch/87iltzn3nd.fsf_-_%40email.froward.int.ebiederm.org/

Get alerted when CVE-2023-1249 or the next vulnerability affects your stack