PT-2025-14364 · Linux+2 · Linux Kernel+2

Published 2025-02-28 · Updated 2026-01-20 · CVE-2025-21983

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.13.2-0 g925d379822da

Description A vulnerability in the Linux kernel has been resolved. The issue is related to the kvfree rcu() APIs using a system workqueue, which can lead to a kernel warning. The warning is caused by the check flush dependency() function. To address this issue, the kernel has been modified to use an independent WQ MEM RECLAIM workqueue. This change ensures that the rules of the workqueue framework are not violated. The estimated number of potentially affected devices is not specified.

Recommendations To resolve the issue, update to a version of the Linux kernel that includes the fix for this vulnerability. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

BDU:2025-11962

CVE-2025-21983

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 25

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21983.json · Exploit
• http://repo.red-soft.ru/redos/8.0/x86_64/updates · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21983 · Vendor Advisory
• https://git.kernel.org/stable/c/a74979dce9e9c61f6d797c3761020252c4d8dc63 · Patch
• https://linux.oracle.com/errata/ELSA-2025-20480.html · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-21983 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21983 · Vendor Advisory
• https://git.kernel.org/stable/c/656e35bf66a11e1adde44c4c12050086dc39f241 · Patch
• https://git.kernel.org/stable/c/dfd3df31c9db752234d7d2e09bef2aeabb643ce4 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-21983 · Security Note
• https://bdu.fstec.ru/vul/2025-11962 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21983 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21983 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-21983 · Vendor Advisory