PT-2026-37591 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-12 · CVE-2026-43251

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 Fake USB devices can send report descriptors that bypass the input mapping() hook. This causes the pm->input ep82 variable to remain NULL, which can lead to a system crash. This issue is triggered when a device masquerades as a legitimate one to provoke the failure.

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-2026-43251

Affected Products

Linux Kernel

References · 19

• https://git.kernel.org/stable/c/e7ac1cd823cd2e9fcbd5cb0b261d6d35dbb79341 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43251 · Vendor Advisory
• https://git.kernel.org/stable/c/d08f35f843881ec504d7537a9bb728a073db3366 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43251 · Security Note
• https://git.kernel.org/stable/c/edccbf7d6dc05d692bde3a89de5a4001f72a0fa4 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43251 · Security Note
• https://git.kernel.org/stable/c/3f1b21cc67a15d7d081378a9b8747dd000a017b8 · Patch
• https://git.kernel.org/stable/c/d5512ce892f774d37c53082adadfcad04f21b50e · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43251 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43251 · Vendor Advisory
• https://git.kernel.org/stable/c/ee572578f09f0e743e9383393a75c3a7a0f9b4c2 · Patch
• https://ubuntu.com/security/CVE-2026-43251 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43251 · Vendor Advisory
• https://git.kernel.org/stable/c/f580c79683356632f12f2c2029f2fe936d953aa1 · Patch
• https://git.kernel.org/stable/c/cee8337e1bad168136aecfe6416ecd7d3aa7529a · Patch