CVE-2025-40129 (GCVE-0-2025-40129)
Vulnerability from cvelistv5
Published
2025-11-12 10:23
Modified
2025-11-12 10:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix null pointer dereference on zero-length checksum In xdr_stream_decode_opaque_auth(), zero-length checksum.len causes checksum.data to be set to NULL. This triggers a NPD when accessing checksum.data in gss_krb5_verify_mic_v2(). This patch ensures that the value of checksum.len is not less than XDR_UNIT.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0653028e8f1c97fec30710813a001ad8a2ec34f4
Version: 0653028e8f1c97fec30710813a001ad8a2ec34f4
Version: 0653028e8f1c97fec30710813a001ad8a2ec34f4
Version: 0653028e8f1c97fec30710813a001ad8a2ec34f4
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sunrpc/auth_gss/svcauth_gss.c"
          ],
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          "vendor": "Linux",
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          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "6.3"
            },
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              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.6.*",
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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\nsunrpc: fix null pointer dereference on zero-length checksum\n\nIn xdr_stream_decode_opaque_auth(), zero-length checksum.len causes\nchecksum.data to be set to NULL. This triggers a NPD when accessing\nchecksum.data in gss_krb5_verify_mic_v2(). This patch ensures that\nthe value of checksum.len is not less than XDR_UNIT."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-12T10:23:21.327Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/81cec07d303186d0d8c623ef8b5ecd3b81e94cf6"
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        {
          "url": "https://git.kernel.org/stable/c/6df164e29bd4e6505c5a2e0e5f1e1f6957a16a42"
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      ],
      "title": "sunrpc: fix null pointer dereference on zero-length checksum",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40129",
    "datePublished": "2025-11-12T10:23:21.327Z",
    "dateReserved": "2025-04-16T07:20:57.170Z",
    "dateUpdated": "2025-11-12T10:23:21.327Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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