{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "70783946f3b5d0c06ec7df0f5e7bec2bfad24efb",
              "status": "affected",
              "version": "ee258d79159afed52ca9372aeb9c1a51e89b32ee",
              "versionType": "git"
            },
            {
              "lessThan": "8f6f8a48399f82f4a83f7b9f25b9707e0062a4f9",
              "status": "affected",
              "version": "ee258d79159afed52ca9372aeb9c1a51e89b32ee",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3c57a0be487088b08d9c88998f911eb4a7ba36e4",
              "versionType": "git"
            },
            {
              "lessThan": "4.21",
              "status": "affected",
              "version": "4.20.11",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/transport.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.20.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: delete compound mids on send failure before unlock\n\nWhen sending a compound request fails, smb_send_rqst() kicks off a\nreconnect. compound_send_recv() still has those mids on pending_mid_q,\nbut it unlocks the server without removing them first.\n\nDuring reconnect, cifs_abort_connection() walks pending_mid_q and runs\neach mid callback. With no response yet, those callbacks return credits\nand drop in_flight. Then compound_send_recv()\u0027s send-error path returns\nthe same credits again. in_flight ends up decremented twice and\nsmb2_add_credits() WARNs.\n\nsyzbot hits this during SMB2_negotiate when the socket send fails.\n\ncifs_call_async() already calls delete_mid() before unlock on send\nfailure. Do the same for compound chains and set cancelled_mid[] so the\nout: path does not delete them again."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:19:44.655Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/70783946f3b5d0c06ec7df0f5e7bec2bfad24efb"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f6f8a48399f82f4a83f7b9f25b9707e0062a4f9"
        }
      ],
      "title": "smb: client: delete compound mids on send failure before unlock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98449",
    "datePublished": "2026-10-18T15:14:59.772Z",
    "dateReserved": "2026-09-25T10:25:14.349Z",
    "dateUpdated": "2026-10-19T09:19:44.655Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}