{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-22984",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-22984"
  ],
  "published": "2026-01-23T15:25:01Z",
  "summary": "libceph: prevent potential out-of-bounds reads in handle_auth_done()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in handle_auth_done()\n\nPerform an explicit bounds check on payload_len to avoid a possible\nout-of-bounds access in the callout.\n\n[ idryomov: changelog ]",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-22984"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/194cfe2af4d2a1de599d39dad636b47c2f6c2c96"
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    },
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    },
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      "url": "https://git.kernel.org/stable/c/818156caffbf55cb4d368f9c3cac64e458fb49c9"
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 9.8,
      "cvss_v3_severity": "Critical",
      "scenario": "AV:N - The vulnerable parser processes Ceph messenger v2 AUTH_DONE frames received over TCP from a remote Ceph monitor/OSD/MDS peer. A malicious or compromised network peer can supply the crafted frame during the connection/authentication handshake.\nAC:L - The attacker controls the frame tag, control-segment length, payload_len, and payload contents needed to reach the unchecked callout. No race or hard-to-influence system state is required.\nPR:N - The bug is reached before the peer has been authenticated by the client-side msgr2 handshake. The remote attacker does not need privileges on the victim system.\nUI:N - In a reasonable Ceph deployment, clients connect or reconnect to monitors, OSDs, and MDS daemons automatically as part of mounted filesystem or block-device operation. A malicious reachable peer can trigger the malformed AUTH_DONE response without further victim interaction.\nS:U - The impact is within the kernel/libceph client security authority on the same host. This does not cross a VM, IOMMU, or other separate security scope boundary.\nC:H - The missing bounds check lets a peer-controlled payload_len make auth callbacks treat memory beyond the received control buffer as valid input. This is an unbounded kernel out-of-bounds read, so confidentiality impact is High.\nI:H - Although described as an out-of-bounds read, the auth_x callbacks can decrypt and clear claimed reply data in place based on attacker-controlled lengths. With the required conservative scoring, this can plausibly become kernel memory corruption and is scored as High integrity impact.\nA:H - Reading or cryptographically processing beyond the allocated control buffer can fault, corrupt memory, or otherwise crash the kernel. The malformed handshake frame can be sent repeatedly by the malicious peer."
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}