{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-74282",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74282",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-15T05:57:52.048Z",
    "updatedAt": "2026-10-16T18:55:29.895Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "tipc: prevent snt_unacked underflow on CONN_ACK",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: prevent snt_unacked underflow on CONN_ACK\n\ntipc_sk_conn_proto_rcv() subtracts the peer-supplied connection ack count\nfrom the unsigned 16-bit send counter snt_unacked without checking that it\ndoes not exceed the number of messages actually outstanding:\n\n\ttsk->snt_unacked -= msg_conn_ack(hdr);\n\nmsg_conn_ack() is read straight from a received CONN_MANAGER/CONN_ACK\nmessage. If the ack count is larger than snt_unacked, the subtraction\nwraps to a near-maximum value, leaving tsk_conn_cong() permanently true\nand starving the connection of further transmits.\n\nValidate the ACK count at the start of the CONN_ACK block and drop the\nmessage if it acknowledges more messages than are outstanding. A peer (or,\nfor a local connection, the connected peer socket) can otherwise wedge a\nTIPC connection's send side by sending an oversized connection ack.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3388145d258cf2c4c98278e3987296007d30672e"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "67e55b054bf8025658dc0e255057f2a6236416bd"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "96f91b8ae1a489b3eca137e7acf42cf985fb8939"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "47ed873e4ceda34098bd46d8e96b4bb13cad3a04"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b44bebdd32c9ff66ee2aebfc317ced44bedd9335"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3cfa3d8e0dc167850edeb5bf5a07757db83fd54e"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1e2c956745777e6ffdee7f30da5935741c03ee1e"
            },
            {
              "version": "10724cc7bb7832b482df049c20fd824d928c5eaa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ab3e10b44ba5411779aac7afd2477917dd77750f"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.7"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}