bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()

{
  "id": "fde5bddfda603851e5b95b5e29306f087dc722f6d7dc44e8a9a2542942c27740",
  "url": "https://osv.dev/vulnerability/CVE-2022-48770",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.",
    "evidence": "osv:CVE-2022-48770",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.96",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.19",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.16.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48770",
      "aliases": [
        "CVE-2022-48770"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "fa28dcb82a38f8e3993b0fae9106b1a80b59e4f0"
                },
                {
                  "fixed": "ff6bdc205fd0a83bd365405d4e31fb5905826996"
                },
                {
                  "fixed": "0bcd484587b3b3092e448d27dc369e347e1810c3"
                },
                {
                  "fixed": "b82ef4985a6d05e80f604624332430351df7b79a"
                },
                {
                  "fixed": "b992f01e66150fc5e90be4a96f5eb8e634c8249e"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48770.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.9.0"
                },
                {
                  "fixed": "5.10.96"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.19"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.16.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48770.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.915720702Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3",
        "https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79a",
        "https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249e",
        "https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48770.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48770",
        "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/2022/48xxx/CVE-2022-48770.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48770",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 498828,
  "published_at": "2024-06-20T11:13:45.193+00:00"
}