PT-2025-51663 · Linux+2 · Linux Kernel+2

Published 2025-12-16 · Updated 2026-02-24 · CVE-2025-68250

Positive Technologies (AI Summary)

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

Description The Linux kernel contains an issue related to the blocker tracking mechanism, which assumes 4-byte alignment of lock pointers. Some architectures, like m68k, only guarantee 2-byte alignment for 32-bit values. This discrepancy causes warnings during runtime checks. The issue is addressed by adjusting the runtime checks to ignore locks that are not 4-byte aligned, effectively disabling the feature on architectures with insufficient alignment and preventing the warnings.

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

Exploit

Related Identifiers

CVE-2025-68250

USN-8029-1

USN-8029-2

USN-8029-3

USN-8030-1

USN-8048-1

Affected Products

Linuxmint

Linux Kernel

Ubuntu

References · 391

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68250.json · Exploit
• https://ubuntu.com/security/CVE-2025-40153 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40066 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40217 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40331 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40166 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40063 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40035 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40049 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-68250 · Security Note
• https://osv.dev/vulnerability/CVE-2025-68250 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40085 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40315 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-68250 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-40185 · Vendor Advisory