CVE-2024-26686

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

03/04/2024

Last modified:

03/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats lock_task_sighand() can trigger a hard lockup. If NR_CPUS threads call do_task_stat() at the same time and the process has NR_THREADS, it will spin with irqs disabled O(NR_CPUS * NR_THREADS) time. Change do_task_stat() to use sig->stats_lock to gather the statistics outside of ->siglock protected section, in the likely case this code will run lockless.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		6.1.82 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.7.6 (excluding)
cpe:2.3:o:linux:linux_kernel:6.8:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.8:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.8:rc3::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-26686

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools