CVE-2026-46027 (GCVE-0-2026-46027)
Vulnerability from cvelistv5
Published
2026-05-27 12:56
Modified
2026-06-14 17:48
Summary
In the Linux kernel, the following vulnerability has been resolved: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group. The decline handling in smc_clc_wait_msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged. This preserves the existing sync_err handling for established link-group contexts and avoids touching link-group state before it is available.
Impacted products
Vendor Product Version
Linux Linux Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
Version: 0cfdd8f92cac01afbb12e4500514036a2b78756b
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{
  "containers": {
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          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/smc/smc_clc.c"
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              "version": "0",
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              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: avoid early lgr access in smc_clc_wait_msg\n\nA CLC decline can be received while the handshake is still in an early\nstage, before the connection has been associated with a link group.\n\nThe decline handling in smc_clc_wait_msg() updates link-group level sync\nstate for first-contact declines, but that state only exists after link\ngroup setup has completed. Guard the link-group update accordingly and\nkeep the per-socket peer diagnosis handling unchanged.\n\nThis preserves the existing sync_err handling for established link-group\ncontexts and avoids touching link-group state before it is available."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:48:56.975Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086"
        },
        {
          "url": "https://git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874"
        },
        {
          "url": "https://git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691"
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        {
          "url": "https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069"
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        {
          "url": "https://git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712"
        },
        {
          "url": "https://git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f"
        }
      ],
      "title": "net/smc: avoid early lgr access in smc_clc_wait_msg",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46027",
    "datePublished": "2026-05-27T12:56:35.628Z",
    "dateReserved": "2026-05-13T15:03:33.093Z",
    "dateUpdated": "2026-06-14T17:48:56.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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