libceph: define and enforce CEPH_MAX_KEY_LEN
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.
CVE-2026-43304
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-43304
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "6405e8c680974bb74e2c98d5249fb52c7b12a6c6",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "8d745d38c88ecbed95f6b2b39857bf89f35a3244",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "e1dc45d97975f9db65694d234fbddf1915176e16",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "1b275bd49e58752efb83767a5d1aed41356c5e64",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "d82467c07b03a27c3c5469b62bb3b726305a80bb",
"versionType": "git"
},
{
"status": "affected",
"version": "cd1a677cad994021b19665ed476aea63f5d54f31",
"lessThan": "ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf",
"versionType": "git"
}
],
"programFiles": [
"net/ceph/crypto.c",
"net/ceph/crypto.h",
"net/ceph/messenger_v2.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.202",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.165",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.128",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.75",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.16",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.6",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ceph/crypto.c",
"net/ceph/crypto.h",
"net/ceph/messenger_v2.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43304
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40056 · Revision 1
- Added to Heist Feed
- Publisher date