Remote service interruption via stale sparse-read state
Published Feb 14, 2026 · Updated Feb 14, 2026
Denial of service in Linux Kernel 6.6 through 6.19-rc4 allows remote attackers to trap libceph OSD reads in a persistent retry loop. In osd_fault(), the OSD client abandons and rebuilds a failed connection without resetting its independent sparse-read state, so a new reply is parsed as a continuation of the old payload. A system must be using libceph for sparse reads against a Ceph OSD, and a mid-payload connection loss or sparse-read error must occur; affected I/O then loops without recovery.
Summary
What happened
Denial of service in Linux Kernel 6.6 through 6.19-rc4 allows remote attackers to trap libceph OSD reads in a persistent retry loop. In osd_fault(), the OSD client abandons and rebuilds a failed connection without resetting its independent sparse-read state, so a new reply is parsed as a continuation of the old payload. A system must be using libceph for sparse reads against a Ceph OSD, and a mid-payload connection loss or sparse-read error must occur; affected I/O then loops without recovery.
The record
- CVE
- CVE-2026-23136
- Published
- Feb 14, 2026
- Updated
- Feb 14, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 14, 2026CVE publishedPublication date reported by the CVE source.
- Feb 14, 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?
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- Affected versionversion=6.6
- Affected versionversion=f628d799972799023d32c2542bb2639eb8c4f84e <10b7c72810364226f7b27916ea3e2a4f870bc04b
- Affected versionversion=f628d799972799023d32c2542bb2639eb8c4f84e <11194b416ef95012c2cfe5f546d71af07b639e93
- Affected versionversion=f628d799972799023d32c2542bb2639eb8c4f84e <90a60fe61908afa0eaf7f8fcf1421b9b50e5f7ff
- Affected versionversion=f628d799972799023d32c2542bb2639eb8c4f84e <e94075e950a6598e710b9f7dffea5aa388f40313
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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