PT-2026-34959 · Linux+1 · Linux Kernel+1

Published 2026-04-24 · Updated 2026-05-06 · CVE-2026-31607

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/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 heap out-of-bounds write exists in the USB/IP client. The function usbip pack ret submit() unconditionally overwrites the number of packets variable from the network PDU. A malicious USB/IP server can provide a value larger than the original submission, which is then used as a loop bound in the usbip recv iso() and usbip pad iso() functions. This leads to memory corruption when writing to the iso frame desc[] array beyond its allocated region.

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

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-31607

ECHO-2462-1FCD-81CD

OPENSUSE-SU-2026:10703-1

RHSA-2026:19568

RHSA-2026:19569

Affected Products

Linux Kernel

Rocky Linux

References · 81

• https://git.kernel.org/stable/c/885c8591784da6314f9aa82fa460ac69f9f79e5f · Patch
• https://git.kernel.org/stable/c/8d155e2d1c4102f74f82a2bf9c016164bb0f7384 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31607 · Vendor Advisory
• https://git.kernel.org/stable/c/ef8ebb1c637b4cfb61a9dd2e013376774ee2033b · Patch
• https://errata.rockylinux.org/RLSA-2026:19568 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31607 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31607 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31607 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10703-1 · Vendor Advisory
• https://git.kernel.org/stable/c/906f16a836de13fe61f49cdce2f66f2dbd14caf4 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31607 · Security Note
• https://git.kernel.org/stable/c/2ab833a16a825373aad2ba7d54b572b277e95b71 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31607 · Vendor Advisory
• https://git.kernel.org/stable/c/5e1c4ece08ccdc197177631f111845a2c68eede3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31607 · Security Note