PT-2026-39123 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-20 · CVE-2026-43462

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 An issue exists in the emac tx mem map() function where DMA (Direct Memory Access) mappings—a method allowing hardware to access system memory independently of the CPU—were leaked when a mapping error occurred.

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

Related Identifiers

CVE-2026-43462

Affected Products

Linux Kernel

References · 13

• https://security-tracker.debian.org/tracker/CVE-2026-43462 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43462 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43462 · Vendor Advisory
• https://git.kernel.org/stable/c/edeaba385318f60ec1b32470da4d5eb800294d16 · Patch
• https://git.kernel.org/stable/c/c34ebd7b24ea70be3c6fdb6936f79f593f37df60 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43462 · Vendor Advisory
• https://git.kernel.org/stable/c/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea · Patch
• https://ubuntu.com/security/CVE-2026-43462 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43462 · Security Note
• https://twitter.com/CVEnew/status/2052767601114386895 · Twitter Post
• https://twitter.com/hetmehtaa/status/2055151398283837677 · Twitter Post
• https://t.me/cveNotify/164283 · Telegram Post
• https://git.kernel.org/linus/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea · Note