PT-2026-36393 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-23 · CVE-2026-31758

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/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 A use-after-free error exists in the usbtmc release function. This occurs because pending anchored URBs (USB Request Blocks) are not properly flushed or killed, which can lead to memory corruption in the HCD (Host Controller Driver) giveback path.

Recommendations Call the usbtmc draw down() function to ensure anchored URBs are completed. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-31758

ECHO-94C6-9137-F8F4

Affected Products

Linux Kernel

References · 19

• https://git.kernel.org/stable/c/95e09b07e50290254b28b8395509473104518f8c · Patch
• https://git.kernel.org/stable/c/959ef329071136e4335b54822fe2f607659b4569 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31758 · Vendor Advisory
• https://git.kernel.org/stable/c/977b632db51d231dec0bc571089a5c2402674139 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31758 · Vendor Advisory
• https://git.kernel.org/stable/c/7fa8f61bab3fb75b5deba8a0f3abb74dc5068d9f · Patch
• https://git.kernel.org/stable/c/d13318dec0c1e0e2ac16f8ecbd522db14cea4bb1 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31758 · Vendor Advisory
• https://git.kernel.org/stable/c/d40198de50232e04c14c6e2092e896766c95ea48 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31758 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31758 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-31758 · Security Note
• https://git.kernel.org/stable/c/8a768552f7a8276fb9e01d49773d2094ace7c8f1 · Patch
• https://ubuntu.com/security/CVE-2026-31758 · Vendor Advisory
• https://git.kernel.org/stable/c/e189d443767f7cd390c52f2e122e1fc41c7562d6 · Patch