CVE-2026-43406

CriticalCVSS 9.1/10Last modified Nov 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

libceph: prevent potential out-of-bounds reads in process_message_header()

If the message frame is (maliciously) corrupted in a way that the length of the control segment ends up being less than the size of the message header or a different frame is made to look like a message frame, out-of-bounds reads may ensue in process_message_header().

Perform an explicit bounds check before decoding the message header.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Weakness enumeration

Affected software

VendorProductVersions
LinuxLinux>= cd1a677cad994021b19665ed476aea63f5d54f31, < 76ccf21a12c5f6d6790bc32c7da82446d877b2f4; >= cd1a677cad994021b19665ed476aea63f5d54f31, < 75582aaa580c11aed4c7731cad6b068b700e7efb; >= cd1a677cad994021b19665ed476aea63f5d54f31, < 50156622eb0888e62541d715a98584480a1bc7cb; >= cd1a677cad994021b19665ed476aea63f5d54f31, < dbd857a9e1e33ea71eaf3e211877027e533770d1; >= cd1a677cad994021b19665ed476aea63f5d54f31, < 69fe5af33fa3806f398d21c081d73c66e5523bc2; >= cd1a677cad994021b19665ed476aea63f5d54f31, < 035867ae6f18df0aeedb2a57a5b74091bd4e3fe8; >= cd1a677cad994021b19665ed476aea63f5d54f31, < 69fb5d91bba44ecf7eb80530b85fa4fb028921d5
LinuxLinux5.11

References

Timeline

Published
May 8, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-43406: Critical severity, CVSS 9.1 | Vulnix