PT-2025-8855 · Linux+5 · Linux Kernel+5

Foster Snowhill · Published 2025-01-26 · Updated 2026-04-20 · CVE-2025-21743

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A potential overflow issue in the DPE length check was identified, which could lead to an out-of-bounds (OoB) read. The issue occurred when wDatagramIndex + wDatagramLength exceeded U16 MAX. To resolve this, the wDatagramIndex term was moved to the other side of the inequality. An existing condition ensures that wDatagramIndex is less than urb->actual length.

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

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

ALSA-2025:20095

ALT-PU-2025-12647

BDU:2025-11889

CVE-2025-21743

OESA-2025-1285

OESA-2025-1286

OPENSUSE-SU-2025_1177-1

OPENSUSE-SU-2025_1178-1

OPENSUSE-SU-2025_1180-1

RHSA-2025:20095

SUSE-SU-2025:01919-1

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_1177-1

SUSE-SU-2025_1178-1

SUSE-SU-2025_1180-1

USN-7521-1

USN-7521-2

USN-7521-3

USN-7651-1

USN-7651-2

USN-7651-3

USN-7651-4

USN-7651-5

USN-7651-6

USN-7652-1

USN-7653-1

USN-7737-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 1770

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21743.json · Exploit
• https://ubuntu.com/security/CVE-2024-57997 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-53148 · Security Note
• https://git.kernel.org/stable/c/c219427ed296f94bb4b91d08626776dc7719ee27 · Patch
• https://ubuntu.com/security/notices/USN-7651-6 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21727 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56651 · Security Note
• https://ubuntu.com/security/CVE-2025-21721 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21716 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21871 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-37798 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-57838 · Security Note
• https://ubuntu.com/security/CVE-2025-21725 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56601 · Security Note
• https://ubuntu.com/security/CVE-2025-21745 · Vendor Advisory