{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5e8d4d36bf23bb7baf027c479d54395840219928"
            },
            {
              "fixed": "505fc50b8ff8e687b7e3ef6866269dea27366224"
            },
            {
              "fixed": "1c705fe8e59c6b16f48964973fb23c8ec4735b73"
            },
            {
              "fixed": "dfe1877d351b99eb1b1a62a3fc2d174220e88e20"
            },
            {
              "fixed": "e2ffeec85201b2bb748e99e12539ee1b92f62796"
            },
            {
              "fixed": "6799d4a916ffcb3d450d8440f9fe0f0862f768d6"
            },
            {
              "fixed": "4f392fec075562dc93bb0c69f37423ca2af9b48f"
            },
            {
              "fixed": "e009c5f0ad634c62f5c48a41f1f3c019ecf52555"
            },
            {
              "fixed": "3660b98d1204b419f6a77e9a295f148dcf38d042"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.15.0"
            },
            {
              "fixed": "5.10.266"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.217"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.184"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.153"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.105"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.46"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80558.json"
  },
  "details": "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't 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",
  "modified": "2026-08-28T03:31:02.913392210Z",
  "published": "2026-08-26T14:37:24.768Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c705fe8e59c6b16f48964973fb23c8ec4735b73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3660b98d1204b419f6a77e9a295f148dcf38d042"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f392fec075562dc93bb0c69f37423ca2af9b48f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/505fc50b8ff8e687b7e3ef6866269dea27366224"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6799d4a916ffcb3d450d8440f9fe0f0862f768d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfe1877d351b99eb1b1a62a3fc2d174220e88e20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e009c5f0ad634c62f5c48a41f1f3c019ecf52555"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2ffeec85201b2bb748e99e12539ee1b92f62796"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80558.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80558"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libceph: Avoid using invalid osd indices from primary_temp"
}