PT-2026-43680 · Linux · Linux Kernel

Published 2026-05-27 · Updated 2026-06-15 · CVE-2026-45846

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A NULL pointer dereference occurs in the bareudp fill metadata dst() function. The function passes bareudp->sock to udp tunnel6 dst lookup() in the IPv6 path without performing a NULL check. Because the socket is created during bareudp open() and set to NULL during bareudp stop(), calling this function while the device is down triggers a NULL dereference via sock->sk.

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

Related Identifiers

CVE-2026-45846

OPENSUSE-SU-2026:10954-1

SUSE-SU-2026:22099-1

SUSE-SU-2026:22108-1

SUSE-SU-2026:22112-1

SUSE-SU-2026:22127-1

Affected Products

Linux Kernel

References · 531

• https://osv.dev/vulnerability/SUSE-SU-2026:22099-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45846 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45846 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45846 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22108-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22127-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45846 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22112-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45846 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-45846 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-45846 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-46092 · Note
• https://suse.com/security/cve/CVE-2026-46155 · Note
• https://suse.com/security/cve/CVE-2026-46127 · Note