PT-2026-36370 · Linux · Linux Kernel

Claude · CVE-2026-31735 · Published 2026-03-02 · Updated 2026-05-23

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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

Description An issue exists in the iommupt component where the unmap process may unmap more than requested if the ending point falls within a large or contiguous Input/Output Page Table Entry (IOPTE). In such cases, the gather process only flushes the range specifically requested for unmapping rather than the entire unmapped range, leading to a short invalidation.

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

Exploit

Weakness Enumeration

CWE-459

Related Identifiers

BDU:2026-10738

CVE-2026-31735

Affected Products

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31735.json · Exploit
• https://git.kernel.org/stable/c/50ecd96a28f712f8b682c0441f4cb9b086d28816 · Patch
• https://bdu.fstec.ru/vul/2026-10738 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31735 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31735 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31735 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31735 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-31735 · Vendor Advisory
• https://git.kernel.org/stable/c/ee6e69d032550687a3422504bfca3f834c7b5061 · Patch
• https://ubuntu.com/security/CVE-2026-31735 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31735 · Security Note
• https://twitter.com/DFIR_Lab/status/2057996260473201024 · Twitter Post
• https://git.kernel.org/linus/ee6e69d032550687a3422504bfca3f834c7b5061 · Note
• https://lore.kernel.org/linux-cve-announce/2026050138-CVE-2026-31735-436c@gregkh · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note