CVE-2026-98453 (GCVE-0-2026-98453)
Vulnerability from cvelistv5
Published
2026-10-18 15:15
Modified
2026-10-21 12:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: close handle after create-context parsing failure SMB2_open() accounts a successful CREATE response as a remote open before parsing its create contexts. If smb2_parse_contexts() rejects malformed context data, SMB2_open() returns without closing the handle, leaving the server-side handle open and num_remote_opens elevated. Close the handle after a post-CREATE context parsing failure so the error path releases the remote resource and balances the open count.
References
Impacted products
Vendor Product Version
Linux Linux Version: 17a0f64cc02d4972e21c733d9f21d1c512963afa
Version: af1689a9b7701d9907dfc84d2a4b57c4bc907144
Version: af1689a9b7701d9907dfc84d2a4b57c4bc907144
Version: af1689a9b7701d9907dfc84d2a4b57c4bc907144
Version: af1689a9b7701d9907dfc84d2a4b57c4bc907144
Version: 6726429c18c62dbf5e96ebbd522f262e016553fb
Version: 13fb0fc4917621f3dfa285a27eaf7151d770b5e5
Version: 890bc4fac3c0973a49cac35f634579bebba7fe48
Version: 1ae3c59355dc9882e09c020afe8ffbd895ad0f29
Version: 6.6.8   ≤
Version: 5.4.277   ≤
Version: 5.10.211   ≤
Version: 5.15.150   ≤
Version: 6.1.79   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2pdu.c"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.7"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.160",
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            },
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              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.18.56",
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            },
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              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: close handle after create-context parsing failure\n\nSMB2_open() accounts a successful CREATE response as a remote open before\nparsing its create contexts.  If smb2_parse_contexts() rejects malformed\ncontext data, SMB2_open() returns without closing the handle, leaving the\nserver-side handle open and num_remote_opens elevated.\n\nClose the handle after a post-CREATE context parsing failure so the error\npath releases the remote resource and balances the open count."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:55:07.969Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/eaa97a196a107d4ef8775df2248181624151812e"
        },
        {
          "url": "https://git.kernel.org/stable/c/80c67cc71d32ccafc89a29b669243b40d81b930f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f09875ff901e933e7b22c913daf51d21e9d93a45"
        },
        {
          "url": "https://git.kernel.org/stable/c/cdb36b09fb1f86d638d0afb44d621ed3f7c1d8eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/566820af017e81497fb5e9d3ad6e7ffe2828bc8b"
        }
      ],
      "title": "smb: client: close handle after create-context parsing failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98453",
    "datePublished": "2026-10-18T15:15:03.262Z",
    "dateReserved": "2026-09-25T10:25:14.350Z",
    "dateUpdated": "2026-10-21T12:55:07.969Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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