PT-2025-51721 · Linux+3 · Linux Kernel+3

Published 2025-09-11 · Updated 2026-05-26 · CVE-2025-68309

Positive Technologies (AI Summary)

CVSS v2.0

4.6

Medium

Base vector

AV:L/AC:L/Au:S/C:N/I:N/A:C

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

Description A flaw exists in the Linux kernel related to PCI/AER functionality. Specifically, a NULL pointer access can occur within the aer info structure due to a potential NULL return from the kzalloc(GFP KERNEL) function. This can lead to a kernel panic if the allocated memory fails.

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

BDU:2026-01358

CVE-2025-68309

ECHO-9219-2E9D-C598

OESA-2026-1759

OESA-2026-1760

OESA-2026-1761

USN-8029-1

USN-8029-2

USN-8029-3

USN-8030-1

USN-8048-1

Affected Products

Debian

Linuxmint

Linux Kernel

Ubuntu

References · 527

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68309.json · Exploit
• https://ubuntu.com/security/CVE-2025-40223 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40333 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68209 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40294 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-40301 · Security Note
• https://ubuntu.com/security/CVE-2025-40040 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68311 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40106 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40341 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40122 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-68183 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40297 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-71134 · Security Note
• https://ubuntu.com/security/CVE-2025-40285 · Vendor Advisory