CVE-2026-43304

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < 6405e8c680974bb74e2c98d5249fb52c7b12a6c6affected
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < 8d745d38c88ecbed95f6b2b39857bf89f35a3244affected
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < e1dc45d97975f9db65694d234fbddf1915176e16affected
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < 1b275bd49e58752efb83767a5d1aed41356c5e64affected
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931edaffected
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < d82467c07b03a27c3c5469b62bb3b726305a80bbaffected
LinuxLinuxcd1a677cad994021b19665ed476aea63f5d54f31 < ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bfaffected
LinuxLinux5.11affected
LinuxLinux0 < 5.11unaffected
LinuxLinux5.15.202 <= 5.15.*unaffected
LinuxLinux6.1.165 <= 6.1.*unaffected
LinuxLinux6.6.128 <= 6.6.*unaffected
LinuxLinux6.12.75 <= 6.12.*unaffected
LinuxLinux6.18.16 <= 6.18.*unaffected
LinuxLinux6.19.6 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References