PT-2025-14335 · Linux+2 · Linux Kernel+2

Published 2025-03-06 · Updated 2026-01-20 · CVE-2025-21954

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV: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 (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved, related to the netmem feature. The issue allowed the transmission of unreadable network memory (netmem) packets into the device's transmit (TX) path, potentially causing the device to call dma-mapping APIs on dma addresses that should not be passed to it. This could lead to security issues. The problem was fixed by preventing the transmission of unreadable skbs. Testing was done using the tc redirect configuration.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Memory Leak

RCE

Weakness Enumeration

CWE-401

CWE-20

Related Identifiers

BDU:2025-11941

CVE-2025-21954

Affected Products

Astra Linux

Linux Kernel

Red Os

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21954.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-21954 · Vendor Advisory
• https://git.kernel.org/stable/c/1c17c8ced25c5fbe424c7ad7ea11d33014a986b1 · Patch
• http://repo.red-soft.ru/redos/8.0/x86_64/updates · Vendor Advisory
• https://git.kernel.org/stable/c/454825019d2f0c59e5174ece9e713f45ad80beff · Patch
• https://linux.oracle.com/errata/ELSA-2025-20480.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-21954 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21954 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21954 · Security Note
• https://git.kernel.org/stable/c/f3600c867c99a2cc8038680ecf211089c50e7971 · Patch
• https://ubuntu.com/security/CVE-2025-21954 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-21954 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21954 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-21954 · Vendor Advisory