FKIE_CVE-2026-52958

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-28 08:16
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in osdmap_decode() When decoding osd_state and osd_weight from an incoming osdmap in osdmap_decode(), both are decoded for each osd, i.e., map->max_osd times. The ceph_decode_need() check only accounts for sizeof(*map->osd_weight) once. This can potentially result in an out-of-bounds memory access if the incoming message is corrupted such that the max_osd value exceeds the actual content of the osdmap message. This patch fixes the issue by changing the corresponding part in the ceph_decode_need() check to account for map->max_osd*sizeof(*map->osd_weight).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "36a79759a288961b1ff28a68ec2d1f56f6848098",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "3f2575bb7f955d42569d96c3e04fa958a0dcf4b4",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "8713bbc4b2b9ad78f803978e54b7e49dd21bd9be",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "0d2dd7e6bb74fd7712aa73457a4a821906c6863a",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "e7187f33c02488697ec0d01d82bf7a3f8deaba8f",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "48df98d12b15360cd56af5c1f460307b340c1197",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "ee933694645dac062d65fc2743f92bc06fa0db6b",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            },
            {
              "lessThan": "35d0ed82d03e5ee77ea4f31f20e29562a7721649",
              "status": "affected",
              "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ceph/osdmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix potential out-of-bounds access in osdmap_decode()\n\nWhen decoding osd_state and osd_weight from an incoming osdmap in\nosdmap_decode(), both are decoded for each osd, i.e., map-\u003emax_osd\ntimes. The ceph_decode_need() check only accounts for\nsizeof(*map-\u003eosd_weight) once. This can potentially result in an\nout-of-bounds memory access if the incoming message is corrupted such\nthat the max_osd value exceeds the actual content of the osdmap message.\n\nThis patch fixes the issue by changing the corresponding part in the\nceph_decode_need() check to account for\nmap-\u003emax_osd*sizeof(*map-\u003eosd_weight)."
    }
  ],
  "id": "CVE-2026-52958",
  "lastModified": "2026-06-28T08:16:26.563",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-24T17:17:06.033",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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