PT-2024-33767 · Linux+5 · Linux Kernel+5

Zhixu Liu

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Published

2024-07-10

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Updated

2026-05-26

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CVE-2024-49926

CVSS v3.1

5.5

Medium

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 6.6.21
Description: The issue is related to the rcu-tasks component in the Linux kernel, specifically with the rcu tasks need gpcb() function. When the kernel is built with CONFIG FORCE NR CPUS=y, it can lead to a system panic due to accessing a non-existent percpu rtpcp variable. The panic occurs because nr cpu ids is defined as NR CPUS instead of the actual number of possible CPUs, causing a page fault. The estimated number of potentially affected devices is not specified.
Recommendations: For Linux kernel versions prior to 6.6.21, consider updating to a newer version to resolve the issue. As a temporary workaround, avoid using the rcu tasks need gpcb() function until a patch is available. Restrict access to the rcu-tasks component to minimize the risk of exploitation.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

ALSA-2025_12746
ALSA-2025_12752
ALSA-2025_12753
ALSA-2025_16880
ALT-PU-2025-12647
AZL-52896
AZL-52959
BDU:2025-13775
CVE-2024-49926
ECHO-A868-98FA-6CBD
OESA-2025-1097
OPENSUSE-SU-2024:14500-1
OPENSUSE-SU-2025:14705-1
USN-7276-1
USN-7277-1
USN-7301-1
USN-7303-1
USN-7303-2
USN-7303-3
USN-7304-1
USN-7310-1
USN-7311-1
USN-7384-1
USN-7384-2
USN-7385-1
USN-7386-1
USN-7403-1
USN-7468-1

Affected Products

Alt Linux
Debian
Linuxmint
Linux Kernel
Red Os
Ubuntu