CVE-2026-43304

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Source
https://cve.org/CVERecord?id=CVE-2026-43304
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43304.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-43304
Downstream
Related
Published
2026-05-08T13:11:24Z
Modified
2026-08-27T18:27:01Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
libceph: define and enforce CEPH_MAX_KEY_LEN
Details

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.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43304.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cd1a677cad994021b19665ed476aea63f5d54f31
Fixed
6405e8c680974bb74e2c98d5249fb52c7b12a6c6
Fixed
8d745d38c88ecbed95f6b2b39857bf89f35a3244
Fixed
e1dc45d97975f9db65694d234fbddf1915176e16
Fixed
1b275bd49e58752efb83767a5d1aed41356c5e64
Fixed
c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed
Fixed
d82467c07b03a27c3c5469b62bb3b726305a80bb
Fixed
ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43304.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.202
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.165
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.128
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.75
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.16
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43304.json"