PT-2026-39067 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-06-01 · CVE-2026-43406

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

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

Description An issue exists in the libceph component where out-of-bounds reads can occur within the process message header() function. This happens if a message frame is corrupted, causing the control segment length to be smaller than the message header size, or if a different frame is misrepresented as a message frame.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-43406

Affected Products

Linux Kernel

References · 19

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43406 · Vendor Advisory
• https://git.kernel.org/stable/c/50156622eb0888e62541d715a98584480a1bc7cb · Patch
• https://cve.org/CVERecord?id=CVE-2026-43406 · Security Note
• https://git.kernel.org/stable/c/69fb5d91bba44ecf7eb80530b85fa4fb028921d5 · Patch
• https://git.kernel.org/stable/c/dbd857a9e1e33ea71eaf3e211877027e533770d1 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43406 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-43406 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43406 · Security Note
• https://git.kernel.org/stable/c/69fe5af33fa3806f398d21c081d73c66e5523bc2 · Patch
• https://git.kernel.org/stable/c/75582aaa580c11aed4c7731cad6b068b700e7efb · Patch
• https://git.kernel.org/stable/c/76ccf21a12c5f6d6790bc32c7da82446d877b2f4 · Patch
• https://git.kernel.org/stable/c/035867ae6f18df0aeedb2a57a5b74091bd4e3fe8 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43406 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43406 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2026-43406 · Note