PT-2026-43677 · Linux · Linux Kernel

Published 2026-05-27 · Updated 2026-06-15 · CVE-2026-45843

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

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

Description The slhc uncompress() function parses VJ-compressed TCP headers by advancing a pointer through the packet using decode() and pull16(). These helper functions do not perform bounds-checks against the packet size isize. Additionally, decode() masks its return value with & 0xffff, preventing it from returning -1, which renders the error-handling paths in the calling functions unreachable. A short compressed frame requesting optional fields allows decode() to read past the end of the packet. These over-read bytes are then incorporated into the cached cstate and affect subsequent reconstructed packets.

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

Related Identifiers

CVE-2026-45843

OPENSUSE-SU-2026:10954-1

SUSE-SU-2026:22048-1

SUSE-SU-2026:22076-1

SUSE-SU-2026:22087-1

SUSE-SU-2026:22108-1

Affected Products

Linux Kernel

References · 514

• https://cve.org/CVERecord?id=CVE-2026-45843 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10954-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22048-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45843 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-45843 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45843 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45843 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22076-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45843 · Security Note
• https://ubuntu.com/security/CVE-2026-45843 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22108-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22087-1 · Vendor Advisory
• https://bugzilla.suse.com/1264091 · Note
• https://suse.com/security/cve/CVE-2026-46217 · Note
• https://suse.com/security/cve/CVE-2026-43013 · Note