CVE-2026-43406 Details
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.
A vulnerability in the Linux kernel's libceph component can lead to out-of-bounds read errors in the process_message_header() function. This issue arises when the message frame is corrupted, causing the control segment length to be shorter than the message header size, or when a different frame is misrepresented as a message frame. Such corruption can result in unauthorized memory access. The vulnerability affects the stable version of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel stable release, which includes the necessary bounds checks to prevent this vulnerability. Instructions for downloading the updated kernel can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/035867ae6f18df0aeedb2a57a5b74091bd4e3fe8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/50156622eb0888e62541d715a98584480a1bc7cb | kernel.org | Patch |
| https://git.kernel.org/stable/c/69fb5d91bba44ecf7eb80530b85fa4fb028921d5 | kernel.org | Patch |
| https://git.kernel.org/stable/c/69fe5af33fa3806f398d21c081d73c66e5523bc2 | kernel.org | Patch |
| https://git.kernel.org/stable/c/75582aaa580c11aed4c7731cad6b068b700e7efb | kernel.org | Patch |
| https://git.kernel.org/stable/c/76ccf21a12c5f6d6790bc32c7da82446d877b2f4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/dbd857a9e1e33ea71eaf3e211877027e533770d1 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.11, < 5.15.203 >= 5.16, < 6.1.167 >= 6.2, < 6.6.130 >= 6.7, < 6.12.78 >= 6.13, < 6.18.19 >= 6.19, < 6.19.9 7.0 rc1 7.0 rc2 7.0 rc3 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 21, 2026 | Initial Analysis | [email protected] |
| May 11, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | New CVE Received | kernel.org |