Remote kernel crash via zeroed auth reply
Published May 27, 2026 · Updated May 27, 2026
NULL pointer dereference in Linux Kernel libceph allows remote attackers to crash affected systems via a crafted Ceph auth reply. ceph_handle_auth_reply accepts protocol and result values of zero, clears ac->ops, skips init_protocol(), and dereferences the null operations pointer. Exploitation requires a rogue Ceph monitor or man-in-the-middle position during client authentication and provides only a service interrupt.
Summary
What happened
NULL pointer dereference in Linux Kernel libceph allows remote attackers to crash affected systems via a crafted Ceph auth reply. ceph_handle_auth_reply accepts protocol and result values of zero, clears ac->ops, skips init_protocol(), and dereferences the null operations pointer. Exploitation requires a rogue Ceph monitor or man-in-the-middle position during client authentication and provides only a service interrupt.
The record
- CVE
- CVE-2026-46024
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-476, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 27, 2026CVE publishedPublication date reported by the CVE source.
- May 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <6.12.86
- Affected versionversion=0 <6.18.27
- Affected versionversion=0 <6.6.140
- Affected versionversion=0 <7.0.4
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <016bc663657366d386993f63eb31072eb45a2b77
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4b2738b93edad661178340239de657d876b73d3d
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5199c125d25aeae8615c4fc31652cc0fe624338e
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8f2be7285941a33a9f72579a23b96392f83c758e
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <927e4bd5692f2a4901808822981fb2c8d4456548
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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