CVE-2025-39880 (GCVE-0-2025-39880)
Vulnerability from cvelistv5
Published
2025-09-23 06:00
Modified
2025-09-23 06:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: libceph: fix invalid accesses to ceph_connection_v1_info There is a place where generic code in messenger.c is reading and another place where it is writing to con->v1 union member without checking that the union member is active (i.e. msgr1 is in use). On 64-bit systems, con->v1.auth_retry overlaps with con->v2.out_iter, so such a read is almost guaranteed to return a bogus value instead of 0 when msgr2 is in use. This ends up being fairly benign because the side effect is just the invalidation of the authorizer and successive fetching of new tickets. con->v1.connect_seq overlaps with con->v2.conn_bufs and the fact that it's being written to can cause more serious consequences, but luckily it's not something that happens often.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371
Impacted products
Vendor Product Version
Linux Linux Version: cd1a677cad994021b19665ed476aea63f5d54f31
Version: cd1a677cad994021b19665ed476aea63f5d54f31
Version: cd1a677cad994021b19665ed476aea63f5d54f31
Version: cd1a677cad994021b19665ed476aea63f5d54f31
Version: cd1a677cad994021b19665ed476aea63f5d54f31
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   Linux Linux Version: 5.11
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/messenger.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.153",
              "versionType": "semver"
            },
            {
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              "version": "6.6.107",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.12.48",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.16.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17-rc6",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: fix invalid accesses to ceph_connection_v1_info\n\nThere is a place where generic code in messenger.c is reading and\nanother place where it is writing to con-\u003ev1 union member without\nchecking that the union member is active (i.e. msgr1 is in use).\n\nOn 64-bit systems, con-\u003ev1.auth_retry overlaps with con-\u003ev2.out_iter,\nso such a read is almost guaranteed to return a bogus value instead of\n0 when msgr2 is in use.  This ends up being fairly benign because the\nside effect is just the invalidation of the authorizer and successive\nfetching of new tickets.\n\ncon-\u003ev1.connect_seq overlaps with con-\u003ev2.conn_bufs and the fact that\nit\u0027s being written to can cause more serious consequences, but luckily\nit\u0027s not something that happens often."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-23T06:00:49.897Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5"
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        },
        {
          "url": "https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371"
        }
      ],
      "title": "libceph: fix invalid accesses to ceph_connection_v1_info",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39880",
    "datePublished": "2025-09-23T06:00:49.897Z",
    "dateReserved": "2025-04-16T07:20:57.144Z",
    "dateUpdated": "2025-09-23T06:00:49.897Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39880\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-23T06:15:47.663\",\"lastModified\":\"2025-09-23T06:15:47.663\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nlibceph: fix invalid accesses to ceph_connection_v1_info\\n\\nThere is a place where generic code in messenger.c is reading and\\nanother place where it is writing to con-\u003ev1 union member without\\nchecking that the union member is active (i.e. msgr1 is in use).\\n\\nOn 64-bit systems, con-\u003ev1.auth_retry overlaps with con-\u003ev2.out_iter,\\nso such a read is almost guaranteed to return a bogus value instead of\\n0 when msgr2 is in use.  This ends up being fairly benign because the\\nside effect is just the invalidation of the authorizer and successive\\nfetching of new tickets.\\n\\ncon-\u003ev1.connect_seq overlaps with con-\u003ev2.conn_bufs and the fact that\\nit\u0027s being written to can cause more serious consequences, but luckily\\nit\u0027s not something that happens often.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/23538cfbeed87159a5ac6c61e7a6de3d8d4486a8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/35dbbc3dbf8bccb2d77c68444f42c1e6d2d27983\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/591ea9c30737663a471b2bb07b27ddde86b020d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6bd8b56899be0b514945f639a89ccafb8f8dfaef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cdbc9836c7afadad68f374791738f118263c5371\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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