CVE-2026-97954 (GCVE-0-2026-97954)
Vulnerability from cvelistv5
Published
2026-09-25 10:23
Modified
2026-10-19 09:11
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net/rds: fix tcp stream corruption with large pages rds_message_map_pages() assigns PAGE_SIZE bytes to every scatterlist entry, even when total_len ends in a partial page. The RDS congestion map is defined as 8192 bytes, so on systems with PAGE_SIZE greater than 8192 the scatterlist maps bytes beyond the end of the congestion map. RDS-TCP transmits the SG contents according to those lengths, so the extra bytes become part of the TCP RDS stream and are interpreted as subsequent RDS message headers, corrupting the stream. Limit the final scatterlist mapping to the number of bytes remaining. This has no effect on systems with a 4K page size and allows RDS-TCP to be used on systems with 16K and larger page sizes. The RDS selftest, which previously hung on 16K pages, now passes.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
Version: 7875e18e09961d29f30424c5e2e48e704dc3789b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rds/message.c"
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            },
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              "version": "0",
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              "status": "unaffected",
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            },
            {
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              "status": "unaffected",
              "version": "6.1.189",
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              "version": "7.2.7",
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: fix tcp stream corruption with large pages\n\nrds_message_map_pages() assigns PAGE_SIZE bytes to every\nscatterlist entry, even when total_len ends in a partial page. The RDS\ncongestion map is defined as 8192 bytes, so on systems with PAGE_SIZE\ngreater than 8192 the scatterlist maps bytes beyond the end of the\ncongestion map.  RDS-TCP transmits the SG contents according to those\nlengths, so the extra bytes become part of the TCP RDS stream and are\ninterpreted as subsequent RDS message headers, corrupting the stream.\n\nLimit the final scatterlist mapping to the number of bytes remaining.\nThis has no effect on systems with a 4K page size and allows RDS-TCP to\nbe used on systems with 16K and larger page sizes.\n\nThe RDS selftest, which previously hung on 16K pages, now passes."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:11:20.455Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7d7705ce73eac1de1146706d887bc969a48ebb6d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3230961a72b312d0e47101d1428084d0a02bff52"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee74a4b42e3a2f9635ba376be9e58311322eebe4"
        },
        {
          "url": "https://git.kernel.org/stable/c/348492de88bc6ea06b6f3dd544a7a00d908a807b"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef3565a418b8309589fe9b5df098a892c9146b06"
        },
        {
          "url": "https://git.kernel.org/stable/c/8cbfeb54bf781d9693778aaba133bb58c0285332"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4649a716be20ef9272f97a166dea1825ba5b554"
        },
        {
          "url": "https://git.kernel.org/stable/c/2ac09b5353fe6858411fdc8c6efa60d832e20f13"
        }
      ],
      "title": "net/rds: fix tcp stream corruption with large pages",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97954",
    "datePublished": "2026-09-25T10:23:01.364Z",
    "dateReserved": "2026-09-25T10:18:58.205Z",
    "dateUpdated": "2026-10-19T09:11:20.455Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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