CVE-2023-2236

Public Exploit
Use-after-free in Linux kernel's Performance Events subsystem

Description

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.03%
Vendor Advisory netapp.com
Affected: Linux Linux Kernel
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4 patch mailing list exploit
https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4 patch exploit
https://security.netapp.com/advisory/ntap-20230601-0010/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-2236?
CVE-2023-2236 has been scored as a high severity vulnerability.
How to fix CVE-2023-2236?
To fix CVE-2023-2236, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-2236 being actively exploited in the wild?
It is possible that CVE-2023-2236 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-2236?
CVE-2023-2236 affects Linux Linux Kernel.
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