PT-2026-43896 · Linux · Linux Kernel

CVE-2026-46029 · Published 2026-05-27 · Updated 2026-07-24

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 unconditionally succeeds. This allows kmalloc nolock() called from a Non-Maskable Interrupt (NMI) context to re-enter the slab allocator and acquire the n->list lock while the interrupted context already holds it, leading to the corruption of the slab state.

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

Exploit

Related Identifiers

CVE-2026-46029

OPENSUSE-SU-2026:10954-1

USN-8488-1

USN-8488-2

USN-8489-1

USN-8507-1

USN-8569-1

USN-8603-1

Affected Products

Linux Kernel

References · 1351

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46029.json · Exploit
• https://ubuntu.com/security/CVE-2026-46135 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46015 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46234 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46002 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31609 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53358 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53115 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-63853 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46063 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53053 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46304 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-53012 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46322 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-46068 · Vendor Advisory