PT-2026-43902 · Linux · Linux Kernel

Published 2026-05-27 · Updated 2026-06-04 · CVE-2026-46035

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 On Uniprocessor (UP) kernels where CONFIG SMP is not enabled, the spin trylock() function acts as a no-op and succeeds unconditionally, even if the lock is already held. This allows alloc frozen pages nolock() called from a Non-Maskable Interrupt (NMI) context to re-enter rmqueue() and acquire a zone lock already held by the interrupted context, leading to the corruption of freelists. This issue can be triggered when CONFIG DEBUG SPINLOCK is enabled on UP systems.

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

Related Identifiers

CVE-2026-46035

OPENSUSE-SU-2026:10954-1

Affected Products

Linux Kernel

References · 286

• https://git.kernel.org/stable/c/05b4ed8bef30bba4f559c8d835e2dd20c48cf8a4 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-46035 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-46035 · Vendor Advisory
• https://git.kernel.org/stable/c/620b46ed6ae17c8438d889c8c0cfddab36a1476c · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-46035 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-46035 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-46035 · Vendor Advisory
• https://git.kernel.org/stable/c/a6d57efeaae3f3b3656514f600eac96be713d90e · Patch
• https://ubuntu.com/security/CVE-2026-46035 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-46219 · Note
• https://suse.com/security/cve/CVE-2026-46064 · Note
• https://suse.com/security/cve/CVE-2026-45994 · Note
• https://suse.com/security/cve/CVE-2026-46039 · Note
• https://suse.com/security/cve/CVE-2026-46229 · Note