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libceph: Fix potential out-of-bounds access in osdmap_decode()

Type: advisorySource: Official CVE List1 source record

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).

Announced Source revision 1
Original source ↗

CVE-2026-52958

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-52958

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
        "lessThan": "36a79759a288961b1ff28a68ec2d1f56f6848098",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
        "lessThan": "3f2575bb7f955d42569d96c3e04fa958a0dcf4b4",
        "versionType": "git"
      },
      {
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        "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
        "lessThan": "8713bbc4b2b9ad78f803978e54b7e49dd21bd9be",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "0d2dd7e6bb74fd7712aa73457a4a821906c6863a",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "e7187f33c02488697ec0d01d82bf7a3f8deaba8f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "dcbc919a5dc8c2629684a113a90c0b6fe10c3462",
        "lessThan": "48df98d12b15360cd56af5c1f460307b340c1197",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "ee933694645dac062d65fc2743f92bc06fa0db6b",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "35d0ed82d03e5ee77ea4f31f20e29562a7721649",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/ceph/osdmap.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.141",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.91",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.33",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.10",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ceph/osdmap.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-52958

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#40714 · Revision 1
Added to Heist Feed
Publisher date
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