CVE-2026-31676 (GCVE-0-2026-31676)
Vulnerability from cvelistv5
Published
2026-04-25 08:46
Modified
2026-04-27 14:04
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: rxrpc: only handle RESPONSE during service challenge Only process RESPONSE packets while the service connection is still in RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before running response verification and security initialization, then use a local secured flag to decide whether to queue the secured-connection work after the state transition. This keeps duplicate or late RESPONSE packets from re-running the setup path and removes the unlocked post-transition state test.
References
Impacted products
Vendor Product Version
Linux Linux Version: 17926a79320afa9b95df6b977b40cca6d8713cea
Version: 17926a79320afa9b95df6b977b40cca6d8713cea
Version: 17926a79320afa9b95df6b977b40cca6d8713cea
Version: 17926a79320afa9b95df6b977b40cca6d8713cea
Version: 17926a79320afa9b95df6b977b40cca6d8713cea
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      "cpeApplicability": [
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: only handle RESPONSE during service challenge\n\nOnly process RESPONSE packets while the service connection is still in\nRXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before\nrunning response verification and security initialization, then use a local\nsecured flag to decide whether to queue the secured-connection work after\nthe state transition. This keeps duplicate or late RESPONSE packets from\nre-running the setup path and removes the unlocked post-transition state\ntest."
        }
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      "metrics": [
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        "dateUpdated": "2026-04-27T14:04:57.519Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
        {
          "url": "https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c"
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      "title": "rxrpc: only handle RESPONSE during service challenge",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31676",
    "datePublished": "2026-04-25T08:46:52.285Z",
    "dateReserved": "2026-03-09T15:48:24.130Z",
    "dateUpdated": "2026-04-27T14:04:57.519Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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