CVE-2026-22992 (GCVE-0-2026-22992)
Vulnerability from cvelistv5 – Published: 2026-01-23 15:24 – Updated: 2026-09-08 08:44
VLAI
EPSS
VEX
Title
libceph: return the handler error from mon_handle_auth_done()
Summary
In the Linux kernel, the following vulnerability has been resolved:
libceph: return the handler error from mon_handle_auth_done()
Currently any error from ceph_auth_handle_reply_done() is propagated
via finish_auth() but isn't returned from mon_handle_auth_done(). This
results in higher layers learning that (despite the monitor considering
us to be successfully authenticated) something went wrong in the
authentication phase and reacting accordingly, but msgr2 still trying
to proceed with establishing the session in the background. In the
case of secure mode this can trigger a WARN in setup_crypto() and later
lead to a NULL pointer dereference inside of prepare_auth_signature().
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 20:37 UTC
Assigner
References
7 references
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
cd1a677cad994021b19665ed476aea63f5d54f31 , < 77229551f2cf72f3e35636db68e6a825b912cf16
(git)
Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < 33908769248b38a5e77cf9292817bb28e641992d (git) Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < e097cd858196b1914309e7e3d79b4fa79383754d (git) Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < d2c4a5f6996683f287f3851ef5412797042de7f1 (git) Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < 9e0101e57534ef0e7578dd09608a6106736b82e5 (git) Affected: cd1a677cad994021b19665ed476aea63f5d54f31 , < e84b48d31b5008932c0a0902982809fbaa1d3b70 (git) |
guessed | |
| Linux | Linux |
Affected:
5.11
Unaffected: 0 , < 5.11 (semver) Unaffected: 5.15.198 , ≤ 5.15.* (semver) Unaffected: 6.1.161 , ≤ 6.1.* (semver) Unaffected: 6.6.121 , ≤ 6.6.* (semver) Unaffected: 6.12.66 , ≤ 6.12.* (semver) Unaffected: 6.18.6 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed | |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
guessed |
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nlibceph: devolver el error del manejador de mon_handle_auth_done()\n\nActualmente, cualquier error de ceph_auth_handle_reply_done() se propaga a trav\u00e9s de finish_auth() pero no se devuelve de mon_handle_auth_done(). Esto resulta en que las capas superiores aprendan que (a pesar de que el monitor nos considere autenticados con \u00e9xito) algo sali\u00f3 mal en la fase de autenticaci\u00f3n y reaccionen en consecuencia, pero msgr2 sigue intentando proceder con el establecimiento de la sesi\u00f3n en segundo plano. En el caso del modo seguro, esto puede activar una ADVERTENCIA en setup_crypto() y m\u00e1s tarde conducir a una desreferencia de puntero NULL dentro de prepare_auth_signature()."
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"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-22992.json",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: return the handler error from mon_handle_auth_done()\n\nCurrently any error from ceph_auth_handle_reply_done() is propagated\nvia finish_auth() but isn\u0027t returned from mon_handle_auth_done(). This\nresults in higher layers learning that (despite the monitor considering\nus to be successfully authenticated) something went wrong in the\nauthentication phase and reacting accordingly, but msgr2 still trying\nto proceed with establishing the session in the background. In the\ncase of secure mode this can trigger a WARN in setup_crypto() and later\nlead to a NULL pointer dereference inside of prepare_auth_signature()."
}
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"value": "AV:N - The vulnerable path is reached by TCP msgr2 frames from a remote Ceph monitor or impersonating peer processed by the kernel Ceph messenger. A malicious or compromised monitor can deliver the crafted AUTH_DONE frame over the network.\nAC:L - The attacker only needs to send an AUTH_DONE in the expected authentication state with secure mode and an auth payload that makes ceph_auth_handle_reply_done() fail. No race, heap grooming, or condition outside the attacker-controlled peer is required.\nPR:N - The frame is processed during the authentication handshake before the monitor response has been accepted as valid. The attacker needs no privileges on the vulnerable host.\nUI:N - In a configured Ceph client deployment, monitor authentication and reconnect handling occur automatically in kernel workqueue context. No additional victim action is required once the client is connecting to the monitor.\nS:U - The impact is within the same kernel security authority as the vulnerable libceph client code. It does not cross a VM, sandbox, or separate authorization boundary.\nC:N - The investigated failure path is a WARN followed by a NULL pointer dereference through uninitialized secure-mode crypto state. There is no evidence of an information disclosure primitive.\nI:N - The bug does not provide an attacker-controlled write or control-flow corruption primitive. The observed and described impact is failure to stop session setup after an auth error, leading to a null dereference.\nA:H - The secure-mode path can dereference a NULL crypto request in kernel context and produce an oops or panic depending on system policy. This is a high availability impact."
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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