PT-2023-1890 · Linux+2 · Linux Kernel+2

Published 2021-12-18 · Updated 2025-03-20 · CVE-2023-23003

Positive Technologies (AI Summary)

CVSS v3.1

4.0

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.16

Description The issue is related to a lack of check for the hashmap new return value in the expr.c file of the Linux kernel's tools/perf/util directory. This could potentially allow an attacker to cause a denial of service or possibly other impacts. The estimated number of potentially affected devices worldwide is not specified.

Recommendations For Linux kernel versions prior to 5.16, update to version 5.16 or later to resolve the issue. As a temporary workaround, consider restricting access to the expr ctx new() function until a patch is available.

Fix

NULL Pointer Dereference

Unchecked Return Value

Weakness Enumeration

CWE-476

CWE-252

Related Identifiers

ALT-PU-2022-1175

ALT-PU-2022-1647

ALT-PU-2022-2155

ALT-PU-2023-1684

ALT-PU-2023-1741

ALT-PU-2023-1814

ALT-PU-2023-4894

AZL-25351

BDU:2023-01492

CVE-2023-23003

Affected Products

Alt Linux

Debian

Linux Kernel

References · 19

• https://github.com/torvalds/linux/commit/0a515a06c5ebfa46fee3ac519e418f801e718da4 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-23003 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-23003 · Security Note
• https://osv.dev/vulnerability/CVE-2023-23003 · Vendor Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-23003 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-01492 · Security Note
• https://osv.dev/vulnerability/AZL-25351 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-23003 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-23003 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-23003 · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-23003 · Note
• https://xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/2.9 · Note
• https://t.me/cibsecurity/59262 · Telegram Post
• https://git.kernel.org/linus/0a515a06c5ebfa46fee3ac519e418f801e718da4 · Note