What is CVE-2023-0240?

CVE-2023-0240 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-01-30.

How severe is CVE-2023-0240?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Linux Kernel

CVE-2023-0240

There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot…

Vulnerability class: Use-After-Free

EPSS: 0.000 (11.6th percentile) — read the EPSS interpretation.

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.

Affected products

Linux Kernel — versions 5.10

Weakness classification (CWE)

CWE-416 — Use After Free

References

git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring
github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49
kernel.dance/

Frequently asked questions

What is CVE-2023-0240?: CVE-2023-0240 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-01-30.
How severe is CVE-2023-0240?: High severity. CVSS v3 base score is 7.8 out of 10.