PT-2026-27712 · Linux+1 · Linux Kernel+1

Published 2026-01-01 · Updated 2026-05-26 · CVE-2026-23347

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 flaw exists in the Linux kernel related to USB communication with the f81604 CAN controller. Specifically, the issue concerns the incorrect anchoring of URB (USB Request Block) structures when submitted using the anchor pattern. If the URB is not properly anchored before submission, it could be leaked if the usb kill anchored urbs() function is called. This issue was present in the read bulk callback function within the driver.

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

Exploit

Related Identifiers

CVE-2026-23347

OPENSUSE-SU-2026:20826-1

SUSE-SU-2026:21841-1

SUSE-SU-2026:21845-1

SUSE-SU-2026:21860-1

Affected Products

Linux Kernel

F81604 Can Controller

References · 21

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23347.json · Exploit
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23347 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-23347 · Vendor Advisory
• https://git.kernel.org/stable/c/c001214e12202338425d6dda5d2a1919d674282d · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23347 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23347 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-23347 · Security Note
• https://osv.dev/vulnerability/CVE-2026-23347 · Vendor Advisory
• https://git.kernel.org/stable/c/952caa5da10bed22be09612433964f6877ba0dde · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23347 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23347 · Vendor Advisory
• https://git.kernel.org/stable/c/54ee74307165b348b2fddcd7942eb48fb4ee1237 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-23347 · Vendor Advisory
• https://git.kernel.org/stable/c/7724645c4792914cd07f36718816c5369cc57970 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-23347 · Vendor Advisory