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Vulnerability record · CVE-2026-43406 · published 8 May 2026

CVE-2026-43406: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

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.

9.1 CVSS 3.1 Critical EPSS 0.72% · top 48.0% CWE-125 · Out-of-bounds read
9.1CVSS 3.1 base score
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/035867ae6f18df0aeedb2a57a5b74091bd4e3fe8 Patch
https://git.kernel.org/stable/c/50156622eb0888e62541d715a98584480a1bc7cb Patch
https://git.kernel.org/stable/c/69fb5d91bba44ecf7eb80530b85fa4fb028921d5 Patch
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/dbd857a9e1e33ea71eaf3e211877027e533770d1 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43406), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.