{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-22992",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-22992"
  ],
  "published": "2026-01-23T15:25:01Z",
  "summary": "libceph: return the handler error from mon_handle_auth_done()",
  "details": "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't 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().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-22992"
    },
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      "url": "https://git.kernel.org/stable/c/77229551f2cf72f3e35636db68e6a825b912cf16"
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.5,
      "cvss_v3_severity": "High",
      "scenario": "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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}