PT-2026-39034 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43373

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/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 memory leak occurs in the Linux kernel within the NCSI RX and AEN handlers. Specifically, the ncsi aen handler() function returns on invalid AEN packets without consuming the socket buffer (skb). Additionally, the ncsi rcv rsp() function exits early when it fails to resolve the NCSI device, response handler, or request, leaving the skb unfreed.

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

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-43373

Affected Products

Linux Kernel

References · 19

• https://git.kernel.org/stable/c/9891d7f4f1ede473c54b49776ae07755083eef06 · Patch
• https://git.kernel.org/stable/c/87138dde2d6937b12b967f28fe598a7d59000ae4 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43373 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43373 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-43373 · Vendor Advisory
• https://git.kernel.org/stable/c/5c3398a54266541610c8d0a7082e654e9ff3e259 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43373 · Vendor Advisory
• https://git.kernel.org/stable/c/59962588197863d0d746879f193905c0c6b3df49 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43373 · Security Note
• https://git.kernel.org/stable/c/b70c4e5e711931cdd56e6e905737b72f1e649189 · Patch
• https://git.kernel.org/stable/c/fef5aa6e3bcf3c8053307642663a63b7362d7552 · Patch
• https://git.kernel.org/stable/c/81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a · Patch
• https://git.kernel.org/stable/c/553366c271479c0d571dd1bb5d1bcde4747fb82e · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43373 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43373 · Vendor Advisory