PT-2025-11006 · Linux+10 · Linux Kernel+10

Haoxiang Li · Published 2025-02-20 · Updated 2026-04-20 · CVE-2025-21844

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 null pointer dereference issue has been resolved in the Linux kernel. The problem occurred in the receive encrypted standard() function, where a check for the return value of cifs buf get() and cifs small buf get() was added to prevent this issue.

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

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALSA-2025:20095

ALSA-2025:20518

ALT-PU-2025-12647

ALT-PU-2025-4301

ALT-PU-2025-4807

AZL-58518

BDU:2025-12192

CVE-2025-21844

DLA-4178-1

DLA-4193-1

DSA-5900-1

ECHO-CA19-6C85-C16B

INFSA-2025_20518

MGASA-2025-0111

MGASA-2025-0112

OESA-2025-1371

OESA-2025-1372

OPENSUSE-SU-2025_1177-1

OPENSUSE-SU-2025_1178-1

OPENSUSE-SU-2025_1180-1

RHSA-2025:20095

RHSA-2025:20518

RHSA-2025_20518

SUSE-SU-2025:01919-1

SUSE-SU-2025:01951-1

SUSE-SU-2025:01967-1

SUSE-SU-2025:1177-1

SUSE-SU-2025:1178-1

SUSE-SU-2025:1180-1

SUSE-SU-2025:20190-1

SUSE-SU-2025:20192-1

SUSE-SU-2025:20260-1

SUSE-SU-2025:20270-1

SUSE-SU-2025_01951-1

SUSE-SU-2025_01967-1

SUSE-SU-2025_1177-1

SUSE-SU-2025_1178-1

SUSE-SU-2025_1180-1

USN-7510-1

USN-7510-2

USN-7510-3

USN-7510-4

USN-7510-5

USN-7510-6

USN-7510-7

USN-7510-8

USN-7511-1

USN-7511-2

USN-7511-3

USN-7512-1

USN-7521-1

USN-7521-2

USN-7521-3

USN-7593-1

USN-7602-1

USN-7703-1

USN-7703-2

USN-7703-3

USN-7703-4

USN-7719-1

USN-7737-1

Affected Products

Alt Linux

Almalinux

Astra Linux

Debian

Linuxmint

Linux Kernel

Red Hat

Red Os

Rocky Linux

Suse

Ubuntu

References · 2086

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21844.json · Exploit
• https://osv.dev/vulnerability/USN-7510-4 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21864 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21739 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58080 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21674 · Security Note
• https://ubuntu.com/security/CVE-2025-23138 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21852 · Vendor Advisory
• https://git.kernel.org/stable/c/f277e479eea3d1aa18bc712abe1d2bf3dece2e30 · Patch
• https://ubuntu.com/security/CVE-2024-58002 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21766 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21737 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-56608 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21750 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21785 · Security Note