{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2022-49402",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49402",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-26T02:12:29.070Z",
    "updatedAt": "2026-05-11T18:59:03.812Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ftrace: Clean up hash direct_functions on register failures",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Clean up hash direct_functions on register failures\n\nWe see the following GPF when register_ftrace_direct fails:\n\n[ ] general protection fault, probably for non-canonical address \\\n  0x200000000000010: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI\n[...]\n[ ] RIP: 0010:ftrace_find_rec_direct+0x53/0x70\n[ ] Code: 48 c1 e0 03 48 03 42 08 48 8b 10 31 c0 48 85 d2 74 [...]\n[ ] RSP: 0018:ffffc9000138bc10 EFLAGS: 00010206\n[ ] RAX: 0000000000000000 RBX: ffffffff813e0df0 RCX: 000000000000003b\n[ ] RDX: 0200000000000000 RSI: 000000000000000c RDI: ffffffff813e0df0\n[ ] RBP: ffffffffa00a3000 R08: ffffffff81180ce0 R09: 0000000000000001\n[ ] R10: ffffc9000138bc18 R11: 0000000000000001 R12: ffffffff813e0df0\n[ ] R13: ffffffff813e0df0 R14: ffff888171b56400 R15: 0000000000000000\n[ ] FS:  00007fa9420c7780(0000) GS:ffff888ff6a00000(0000) knlGS:000000000\n[ ] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ ] CR2: 000000000770d000 CR3: 0000000107d50003 CR4: 0000000000370ee0\n[ ] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ ] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ ] Call Trace:\n[ ]  <TASK>\n[ ]  register_ftrace_direct+0x54/0x290\n[ ]  ? render_sigset_t+0xa0/0xa0\n[ ]  bpf_trampoline_update+0x3f5/0x4a0\n[ ]  ? 0xffffffffa00a3000\n[ ]  bpf_trampoline_link_prog+0xa9/0x140\n[ ]  bpf_tracing_prog_attach+0x1dc/0x450\n[ ]  bpf_raw_tracepoint_open+0x9a/0x1e0\n[ ]  ? find_held_lock+0x2d/0x90\n[ ]  ? lock_release+0x150/0x430\n[ ]  __sys_bpf+0xbd6/0x2700\n[ ]  ? lock_is_held_type+0xd8/0x130\n[ ]  __x64_sys_bpf+0x1c/0x20\n[ ]  do_syscall_64+0x3a/0x80\n[ ]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ ] RIP: 0033:0x7fa9421defa9\n[ ] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 9 f8 [...]\n[ ] RSP: 002b:00007ffed743bd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141\n[ ] RAX: ffffffffffffffda RBX: 00000000069d2480 RCX: 00007fa9421defa9\n[ ] RDX: 0000000000000078 RSI: 00007ffed743bd80 RDI: 0000000000000011\n[ ] RBP: 00007ffed743be00 R08: 0000000000bb7270 R09: 0000000000000000\n[ ] R10: 00000000069da210 R11: 0000000000000246 R12: 0000000000000001\n[ ] R13: 00007ffed743c4b0 R14: 00000000069d2480 R15: 0000000000000001\n[ ]  </TASK>\n[ ] Modules linked in: klp_vm(OK)\n[ ] ---[ end trace 0000000000000000 ]---\n\nOne way to trigger this is:\n  1. load a livepatch that patches kernel function xxx;\n  2. run bpftrace -e 'kfunc:xxx {}', this will fail (expected for now);\n  3. repeat #2 => gpf.\n\nThis is because the entry is added to direct_functions, but not removed.\nFix this by remove the entry from direct_functions when\nregister_ftrace_direct fails.\n\nAlso remove the last trailing space from ftrace.c, so we don't have to\nworry about it anymore.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "82c888e51c2176a06f8b4541cf748ee81aac6e7e"
            },
            {
              "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cae2978d6907ef2c08b9b15f704e783f7c284713"
            },
            {
              "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "805e87af946d8d2954171361e64d143ff37a441b"
            },
            {
              "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a0392833a178cf109a57c2a9d4d531bdfc6cd98f"
            },
            {
              "version": "763e34e74bb7d5c316015e2e39fcc8520bfd071c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7d54c15cb89a29a5f59e5ffc9ee62e6591769ef1"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.5",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "5.10.121",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.46",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.17.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.17.*"
            },
            {
              "version": "5.18.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "version": "5.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}