powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak

{
  "id": "a086837675ec5814a674cea7f799e5d7ae51b4b789216e7585ad7f99bd21423f",
  "url": "https://osv.dev/vulnerability/CVE-2026-80571",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak In papr_phy_attest_create_handle(), the params->cmd.length is not validated before use, which can result in a buffer overlow. Check it and return -EINVAL if it is either 0 or exceeds sizeof(params->cmd). Also, params is freed on the success path but not error. Free it on errors after memory allocation. And free it on negative fd.",
    "evidence": "osv:CVE-2026-80571",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.46",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-80571",
      "aliases": [
        "CVE-2026-80571"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "86900ab620a42396a749b506d4a187820fc3fabe"
                },
                {
                  "fixed": "828a8d1a9107aec6353d896882df8383accf7e80"
                },
                {
                  "fixed": "ed98ce338f9a65c90cb930b088f1eb36de7181af"
                },
                {
                  "fixed": "5b17f3f34391372faf03e79d947e0c50ab6dd258"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80571.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.46"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80571.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.773036245Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/5b17f3f34391372faf03e79d947e0c50ab6dd258",
        "https://git.kernel.org/stable/c/828a8d1a9107aec6353d896882df8383accf7e80",
        "https://git.kernel.org/stable/c/ed98ce338f9a65c90cb930b088f1eb36de7181af",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80571.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80571",
        "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/2026/80xxx/CVE-2026-80571.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80571",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517155,
  "published_at": "2026-08-26T14:37:32.541+00:00"
}