PT-2025-4363 · Linux+5 · Linux Kernel+5

Published 2025-01-08 · Updated 2026-05-26 · CVE-2025-21682

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 The issue is related to a null pointer dereference in the Linux kernel's bnxt driver. This occurs when the XDP (eXpress Data Path) is detached, and the features are not recalculated, leading to a potential crash. The problem arises when the driver attempts to access a freed ring, resulting in a kernel NULL pointer dereference. The issue has been present since XDP support was added but did not cause major problems until a specific commit.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2025-12647

ALT-PU-2025-3467

AZL-56384

AZL-56414

BDU:2025-01484

CVE-2025-21682

ECHO-6A40-1D94-17DD

OESA-2025-1959

OESA-2025-1960

OESA-2025-1961

OPENSUSE-SU-2025_0428-1

OPENSUSE-SU-2025_0499-1

OPENSUSE-SU-2025_0557-1

SUSE-SU-2025:0428-1

SUSE-SU-2025:0499-1

SUSE-SU-2025:0557-1

SUSE-SU-2025:0564-1

SUSE-SU-2025:0565-1

SUSE-SU-2025:20165-1

SUSE-SU-2025:20166-1

SUSE-SU-2025:20248-1

SUSE-SU-2025:20249-1

SUSE-SU-2025_0428-1

SUSE-SU-2025_0499-1

SUSE-SU-2025_0557-1

USN-7445-1

USN-7448-1

USN-7595-1

USN-7595-2

USN-7595-3

USN-7595-4

USN-7595-5

USN-7596-1

USN-7596-2

USN-7653-1

Affected Products

Alt Linux

Debian

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 1691

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21682.json · Exploit
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21696 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21707 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58007 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21718 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-58070 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57951 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21682 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38427 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-38380 · Security Note
• https://ubuntu.com/security/CVE-2025-21736 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57950 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-57982 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38048 · Security Note