{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "17926a79320afa9b95df6b977b40cca6d8713cea"
            },
            {
              "fixed": "a1a8efde03a40b6c658d580e96644d9b9a2a0d3a"
            },
            {
              "fixed": "6c3a0fbdafef8316e34ae22333e317a341e737cd"
            },
            {
              "fixed": "0afdfd4941c1b60a1f5c361760daa970edca60cd"
            },
            {
              "fixed": "a6bcf8010af093fe04f7100562e9542ab7882585"
            },
            {
              "fixed": "29b44d904dceb832be880def08b8cb17a0aba91c"
            },
            {
              "fixed": "d0035e634dae83237ab7f5681eb52b2f65d0ceb8"
            },
            {
              "fixed": "03fd2ef73cb4ffd0af100a95b634af54f474414e"
            },
            {
              "fixed": "c43ffdcfdbb5567b1f143556df8a04b4eeea041c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.22"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.84"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.23"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31676.json"
  },
  "details": "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.",
  "id": "CVE-2026-31676",
  "modified": "2026-07-08T05:36:05.197220621Z",
  "published": "2026-04-25T08:46:52.285Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31676.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31676"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rxrpc: only handle RESPONSE during service challenge"
}