PT-2026-38972 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43321

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description An issue exists in the BPF verifier where live registers for indirect jumps are not properly marked. Specifically, for a gotox rX instruction, the rX register is not marked as used within the compute insn live regs() function.

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

Related Identifiers

CVE-2026-43321

Affected Products

Linux Kernel

References · 16

• https://security-tracker.debian.org/tracker/CVE-2026-43321 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43321 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43321 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43321 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43321 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-43321 · Security Note
• https://git.kernel.org/stable/c/7beae54111c34ca63357ef120e115889b915beb5 · Patch
• https://git.kernel.org/stable/c/d1aab1ca576c90192ba961094d51b0be6355a4d6 · Patch
• https://twitter.com/CVEnew/status/2053131459553382436 · Twitter Post
• https://t.me/cveNotify/162850 · Telegram Post
• https://twitter.com/windowsforum/status/2053780325445107880 · Twitter Post
• https://t.me/cveNotify/163658 · Telegram Post
• https://git.kernel.org/linus/d1aab1ca576c90192ba961094d51b0be6355a4d6 · Note
• https://twitter.com/infoflowcloud/status/2053133174692041090 · Twitter Post
• https://git.kernel.org/stable/c/df02c3ff3be4bf998812c8c8e79d10db1329d535 · Note