libceph: define and enforce CEPH_MAX_KEY_LEN

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Summary

CVECVE-2026-43304
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 14:16:37 UTC
Updated2026-05-11 08:16:08 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000240000 probability, percentile 0.070400000 (date 2026-05-10)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 6405e8c680974bb74e2c98d5249fb52c7b12a6c6 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 8d745d38c88ecbed95f6b2b39857bf89f35a3244 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 e1dc45d97975f9db65694d234fbddf1915176e16 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 1b275bd49e58752efb83767a5d1aed41356c5e64 git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 d82467c07b03a27c3c5469b62bb3b726305a80bb git Not specified
CNA Linux Linux affected cd1a677cad994021b19665ed476aea63f5d54f31 ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf git Not specified
CNA Linux Linux affected 5.11 Not specified
CNA Linux Linux unaffected 5.11 semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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