FKIE_CVE-2026-80558

Vulnerability from fkie_nvd - Published: 2026-08-26 15:17 - Updated: 2026-10-16 20:18
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: libceph: Avoid using invalid osd indices from primary_temp A corrupted osdmap received from a Ceph monitor or OSD may contain osd indices in its pg_temp, primary_temp, pg_upmap, and pg_upmap_items parts that don't exist, i.e., that are greater than max_osd or smaller than CEPH_HOMELESS_OSD (-1). These indices are used to create the up and acting set in ceph_pg_to_up_acting_osds(), called from calc_target(). While most of these osd indices are checked, the one from primary_temp is not. Subsequently, this may lead to calc_target() returning this (potentially invalid) index as target osd for a (linger) request. Because the osd_state, osd_weight, and osd_addr arrays only contain max_osd entries (with indices 0 to max_osd -1), this leads to out-of-bounds accesses when trying to read values from these arrays. This patch fixes the issue by adding a check to get_temp_osds(), so that only valid osd indices from primary_temp are used, and it falls back to using the primary from pg_temp or the up set if it is invalid. [ idryomov: changelog ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c705fe8e59c6b16f48964973fb23c8ec4735b73
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3660b98d1204b419f6a77e9a295f148dcf38d042
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f392fec075562dc93bb0c69f37423ca2af9b48f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/505fc50b8ff8e687b7e3ef6866269dea27366224
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6799d4a916ffcb3d450d8440f9fe0f0862f768d6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfe1877d351b99eb1b1a62a3fc2d174220e88e20
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e009c5f0ad634c62f5c48a41f1f3c019ecf52555
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2ffeec85201b2bb748e99e12539ee1b92f62796
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": "505fc50b8ff8e687b7e3ef6866269dea27366224",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "1c705fe8e59c6b16f48964973fb23c8ec4735b73",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "dfe1877d351b99eb1b1a62a3fc2d174220e88e20",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "e2ffeec85201b2bb748e99e12539ee1b92f62796",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "6799d4a916ffcb3d450d8440f9fe0f0862f768d6",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "4f392fec075562dc93bb0c69f37423ca2af9b48f",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "e009c5f0ad634c62f5c48a41f1f3c019ecf52555",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "versionType": "git"
            },
            {
              "lessThan": "3660b98d1204b419f6a77e9a295f148dcf38d042",
              "status": "affected",
              "version": "5e8d4d36bf23bb7baf027c479d54395840219928",
              "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": "3.15"
            },
            {
              "lessThan": "3.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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: Avoid using invalid osd indices from primary_temp\n\nA corrupted osdmap received from a Ceph monitor or OSD may contain osd\nindices in its pg_temp, primary_temp, pg_upmap, and pg_upmap_items parts\nthat don\u0027t exist, i.e., that are greater than max_osd or smaller than\nCEPH_HOMELESS_OSD (-1). These indices are used to create the up and\nacting set in ceph_pg_to_up_acting_osds(), called from calc_target().\nWhile most of these osd indices are checked, the one from primary_temp\nis not. Subsequently, this may lead to calc_target() returning this\n(potentially invalid) index as target osd for a (linger) request.\nBecause the osd_state, osd_weight, and osd_addr arrays only contain\nmax_osd entries (with indices 0 to max_osd -1), this leads to\nout-of-bounds accesses when trying to read values from these arrays.\n\nThis patch fixes the issue by adding a check to get_temp_osds(), so that\nonly valid osd indices from primary_temp are used, and it falls back to\nusing the primary from pg_temp or the up set if it is invalid.\n\n[ idryomov: changelog ]"
    }
  ],
  "id": "CVE-2026-80558",
  "lastModified": "2026-10-16T20:18:00.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-80558",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T19:17:27.873915Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-26T15:17:10.530",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1c705fe8e59c6b16f48964973fb23c8ec4735b73"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3660b98d1204b419f6a77e9a295f148dcf38d042"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f392fec075562dc93bb0c69f37423ca2af9b48f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/505fc50b8ff8e687b7e3ef6866269dea27366224"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6799d4a916ffcb3d450d8440f9fe0f0862f768d6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfe1877d351b99eb1b1a62a3fc2d174220e88e20"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e009c5f0ad634c62f5c48a41f1f3c019ecf52555"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e2ffeec85201b2bb748e99e12539ee1b92f62796"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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