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.
Affected products
linux: linux kernel
References7
- git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64 Patch
- git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6 Patch
- git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244 Patch
- git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf Patch
- git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed Patch
- git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb Patch
- git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16 Patch
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 50 · as of 13 November 2026
- CWE
- CWE-121
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