PT-2026-34952 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-06 · CVE-2026-31600

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/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 In the arm64 architecture, the kernel fails to correctly handle invalid large leaf mappings. This occurs when page table entries (ptes) in the linear map are marked as invalid by clearing the PTE VALID bit, a process used for features such as secretmem, kfence, and realm DMA memory sharing. Certain parts of the code base are not equipped to process these invalid large leaf mappings, which can lead to a kernel panic during the boot process of a realm guest.

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

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-31600

OPENSUSE-SU-2026:10703-1

Affected Products

Linux Kernel

References · 73

• https://git.kernel.org/stable/c/747b6482e4e227fd351197dde6f64a97107a9e52 · Patch
• https://git.kernel.org/stable/c/8140b21d19015227a28c255404462f2d3e6edc9a · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31600 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10703-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31600 · Vendor Advisory
• https://git.kernel.org/stable/c/cbea627ea634f41c79d18f0c6d20db66fa93514c · Patch
• https://ubuntu.com/security/CVE-2026-31600 · Vendor Advisory
• https://git.kernel.org/stable/c/15bfba1ad77fad8e45a37aae54b3c813b33fe27c · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31600 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31600 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-31600 · Security Note
• https://suse.com/security/cve/CVE-2026-31577 · Note
• https://suse.com/security/cve/CVE-2026-31587 · Note
• https://suse.com/security/cve/CVE-2026-31578 · Note
• https://suse.com/security/cve/CVE-2026-31590 · Note