Squashfs: check metadata block offset is within range

{
  "id": "13f73c145b8cb51f5d62f4cc0fd50f3ef0dc5f5f66074d14434610bdc52bd431",
  "url": "https://osv.dev/vulnerability/CVE-2026-23388",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Squashfs: check metadata block offset is within range",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Squashfs: check metadata block offset is within range Syzkaller reports a \"general protection fault in squashfs_copy_data\" This is ultimately caused by a corrupted index look-up table, which produces a negative metadata block offset. This is subsequently passed to squashfs_copy_data (via squashfs_read_metadata) where the negative offset causes an out of bounds access. The fix is to check that the offset is within range in squashfs_read_metadata. This will trap this and other cases.",
    "evidence": "osv:CVE-2026-23388",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.253",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.203",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.167",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.130",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.77",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23388",
      "aliases": [
        "CVE-2026-23388"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f400e12656ab518be107febfe2315fb1eab5a342"
                },
                {
                  "fixed": "60f679f643f3f36a8571ea585e4ce5d93ef952b5"
                },
                {
                  "fixed": "3f68a9457a6190814377577374da75f872e0a013"
                },
                {
                  "fixed": "0c8ab092aec3ac4294940054772d30b511b16713"
                },
                {
                  "fixed": "6b847d65f5b0065e02080c61fad93d57d6686383"
                },
                {
                  "fixed": "9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c"
                },
                {
                  "fixed": "01ee0bcc29864b78249308e8b35042b09bbf5fe3"
                },
                {
                  "fixed": "3b9499e7d677dd4366239a292238489a804936b2"
                },
                {
                  "fixed": "fdb24a820a5832ec4532273282cbd4f22c291a0d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23388.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.29"
                },
                {
                  "fixed": "5.10.253"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.203"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.167"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.130"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.77"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.17"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23388.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.439762601Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
        "https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3",
        "https://git.kernel.org/stable/c/0c8ab092aec3ac4294940054772d30b511b16713",
        "https://git.kernel.org/stable/c/3b9499e7d677dd4366239a292238489a804936b2",
        "https://git.kernel.org/stable/c/3f68a9457a6190814377577374da75f872e0a013",
        "https://git.kernel.org/stable/c/60f679f643f3f36a8571ea585e4ce5d93ef952b5",
        "https://git.kernel.org/stable/c/6b847d65f5b0065e02080c61fad93d57d6686383",
        "https://git.kernel.org/stable/c/9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c",
        "https://git.kernel.org/stable/c/fdb24a820a5832ec4532273282cbd4f22c291a0d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23388.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23388",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23388.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23388",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 499351,
  "published_at": "2026-03-25T10:28:06.224+00:00"
}