Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.11, < 5.15.202 |
References
- https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64Patch
- https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6Patch
- https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244Patch
- https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bfPatch
- https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931edPatch
- https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bbPatch
- https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16Patch
FAQ
What is CVE-2026-43304?
CVE-2026-43304 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 buffe...
How severe is CVE-2026-43304?
CVE-2026-43304 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-43304?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.