CVE-2026-43304libceph: define and enforce CEPH_MAX_KEY_LEN
Updated under an hour ago ()
Does this affect you?
It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cd1a677cad994021b19665ed476aea63f5d54f31 before 6405e8c680974bb74e2c98d5249fb52c7b12a6c6; from cd1a677cad994021b19665ed476aea63f5d54f31 before 8d745d38c88ecbed95f6b2b39857bf89f35a3244; from cd1a677cad994021b19665ed476aea63f5d54f31 before e1dc45d97975f9db65694d234fbddf1915176e16; from cd1a677cad994021b19665ed476aea63f5d54f31 before 1b275bd49e58752efb83767a5d1aed41356c5e64; from cd1a677cad994021b19665ed476aea63f5d54f31 before c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed; from cd1a677cad994021b19665ed476aea63f5d54f31 before d82467c07b03a27c3c5469b62bb3b726305a80bb; from cd1a677cad994021b19665ed476aea63f5d54f31 before ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf | CNA record |
linux linux_kernel linux:linux_kernel | from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6 | NVD |
References
- https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6patch
- https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244patch
- https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16patch
- https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64patch
- https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931edpatch
- https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bbpatch
- https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bfpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.