CVE-2026-43304 Details
Description
In the Linux kernel, the following vulnerability has been resolved: libceph: define and enforce CEPH_MAX_KEY_LEN When decoding the key, verify that the key material would fit into a fixed-size buffer in process_auth_done() and generally has a sane length. The new CEPH_MAX_KEY_LEN check replaces the existing check for a key with no key material which is a) not universal since CEPH_CRYPTO_NONE has to be excluded and b) doesn't provide much value since a smaller than needed key is just as invalid as no key -- this has to be handled elsewhere anyway.
A vulnerability in the Linux kernel's libceph component has been addressed by defining and enforcing a maximum key length. The issue arose because the previous key length validation was inadequate, allowing for potential buffer overflows. The new check ensures that key material fits within a fixed-size buffer and has a reasonable length, excluding the 'none' crypto option. This vulnerability affects the stable group of the Linux kernel.
Users can update to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched version can be found in the Linux kernel documentation.
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
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf | kernel.org | Patch |
| https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed | kernel.org | Patch |
| https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb | kernel.org | Patch |
| https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.11, < 5.15.202 >= 5.16, < 6.1.165 >= 6.2, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.16 >= 6.19, < 6.19.6 |
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 15, 2026 | Initial Analysis | [email protected] |
| May 11, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | New CVE Received | kernel.org |