CVE-2023-2236

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

CVSS 7.8 HIGHEPSS 0.4%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

01 May 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux Kernel

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References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4 https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4 https://security.netapp.com/advisory/ntap-20230601-0010/