PT-2026-34975 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-06 · CVE-2026-31623

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 A malicious USB device claiming to be a CDC Phonet modem can cause an overflow of the skb shared info->frags[] array in the rx complete() function by sending an unbounded sequence of full-page bulk transfers.

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

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2026-31623

ECHO-9147-AB0A-6420

OPENSUSE-SU-2026:10703-1

Affected Products

Linux Kernel

References · 78

• https://osv.dev/vulnerability/BELL-CVE-2026-31623 · Vendor Advisory
• https://git.kernel.org/stable/c/a23b1b1aaf41e174181d5853a70e65d4d01e648c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31623 · Security Note
• https://git.kernel.org/stable/c/ebf75c6301c4972a87542ebf2d994c6391eb5d46 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31623 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10703-1 · Vendor Advisory
• https://git.kernel.org/stable/c/600dc40554dc5ad1e6f3af51f700228033f43ea7 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31623 · Vendor Advisory
• https://git.kernel.org/stable/c/d4e1946bea8d6441835eb3fd09b19237ba366a6f · Patch
• https://ubuntu.com/security/CVE-2026-31623 · Vendor Advisory
• https://git.kernel.org/stable/c/9989938d13cc5ba8447eeed5a61acfcf61bc6801 · Patch
• https://git.kernel.org/stable/c/c183d5775129a0a7495bd61a6e57ec230dcf01e5 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31623 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31623 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-31577 · Note