Select your cookie preferences

We use cookies and similar tools to enhance your experience, provide our services, deliver relevant advertising, and make improvements. Approved third parties also use these tools to help us deliver advertising and provide certain site features.

CVE-2023-2235

Public on 2023-05-01
Modified on 2024-01-12
Description

A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.

The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.

We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

Severity
Important
See what this means
CVSS v3 Base Score
7.8
See breakdown
Continue reading

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-05-15 23:18 ALAS2KERNEL-5.15-2023-019
Amazon Linux 2023 kernel 2023-03-30 21:11 ALAS2023-2023-148

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Red Hat: CVE-2023-2235 Mitre: CVE-2023-2235 FAQs regarding Amazon Linux ALAS/CVE Severity