tracing/eprobes: Do not allow eprobes to use $stack, or % for regs

{
  "id": "ea4b73b9e290f7c88fc14305fe3c12763259c3a6b01ce9f7f0b5bde673142f60",
  "url": "https://osv.dev/vulnerability/CVE-2022-50078",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tracing/eprobes: Do not allow eprobes to use $stack, or % for regs",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: tracing/eprobes: Do not allow eprobes to use $stack, or % for regs While playing with event probes (eprobes), I tried to see what would happen if I attempted to retrieve the instruction pointer (%rip) knowing that event probes do not use pt_regs. The result was: BUG: kernel NULL pointer dereference, address: 0000000000000024 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 1847 Comm: trace-cmd Not tainted 5.19.0-rc5-test+ #309 Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v03.03 07/14/2016 RIP: 0010:get_event_field.isra.0+0x0/0x50 Code: ff 48 c7 c7 c0 8f 74 a1 e8 3d 8b f5 ff e8 88 09 f6 ff 4c 89 e7 e8 50 6a 13 00 48 89 ef 5b 5d 41 5c 41 5d e9 42 6a 13 00 66 90 <48> 63 47 24 8b 57 2c 48 01 c6 8b 47 28 83 f8 02 74 0e 83 f8 04 74 RSP: 0018:ffff916c394bbaf0 EFLAGS: 00010086 RAX: ffff916c854041d8 RBX: ffff916c8d9fbf50 RCX: ffff916c255d2000 RDX: 0000000000000000 RSI: ffff916c255d2008 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff916c3a2a0c08 R09: ffff916c394bbda8 R10: 0000000000000000 R11: 0000000000000000 R12: ffff916c854041d8 R13: ffff916c854041b0 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff916c9ea40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000024 CR3: 000000011b60a002 CR4: 00000000001706e0 Call Trace: ge",
    "evidence": "osv:CVE-2022-50078",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.63",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50078",
      "aliases": [
        "CVE-2022-50078"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7491e2c442781a1860181adb5ab472a52075f393"
                },
                {
                  "fixed": "ba53c21ce9773743b8e0a8ada048c96ff2d55c67"
                },
                {
                  "fixed": "7c262114a576d94c0ced80e232bbb17391a55908"
                },
                {
                  "fixed": "2673c60ee67e71f2ebe34386e62d348f71edee47"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50078.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.15.0"
                },
                {
                  "fixed": "5.15.63"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.19.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50078.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.980468644Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2673c60ee67e71f2ebe34386e62d348f71edee47",
        "https://git.kernel.org/stable/c/7c262114a576d94c0ced80e232bbb17391a55908",
        "https://git.kernel.org/stable/c/ba53c21ce9773743b8e0a8ada048c96ff2d55c67",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50078.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50078",
        "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/2022/50xxx/CVE-2022-50078.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50078",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490314,
  "published_at": "2025-06-18T11:02:21.119+00:00"
}