FKIE_CVE-2023-53557

Vulnerability from fkie_nvd - Published: 2025-10-04 16:15 - Updated: 2026-02-12 16:13
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fprobe: Release rethook after the ftrace_ops is unregistered While running bpf selftests it's possible to get following fault: general protection fault, probably for non-canonical address \ 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC NOPTI ... Call Trace: <TASK> fprobe_handler+0xc1/0x270 ? __pfx_bpf_testmod_init+0x10/0x10 ? __pfx_bpf_testmod_init+0x10/0x10 ? bpf_fentry_test1+0x5/0x10 ? bpf_fentry_test1+0x5/0x10 ? bpf_testmod_init+0x22/0x80 ? do_one_initcall+0x63/0x2e0 ? rcu_is_watching+0xd/0x40 ? kmalloc_trace+0xaf/0xc0 ? do_init_module+0x60/0x250 ? __do_sys_finit_module+0xac/0x120 ? do_syscall_64+0x37/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc </TASK> In unregister_fprobe function we can't release fp->rethook while it's possible there are some of its users still running on another cpu. Moving rethook_free call after fp->ops is unregistered with unregister_ftrace_function call.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03d63255a5783243c110aec5e6ae2f1475c3be76Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f81018753dfd4989e33ece1f0cb6b8aae498b82Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ce3ec57faff559ccae1e0150c1f077eb2df648a4Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.5
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "38286689-0DC4-488B-9C9D-06EA4998CA6F",
              "versionEndExcluding": "6.1.40",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "923F6AEA-C2EF-4B08-B038-69A18F3D41F8",
              "versionEndExcluding": "6.4.5",
              "versionStartIncluding": "6.2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "0B3E6E4D-E24E-4630-B00C-8C9901C597B0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfprobe: Release rethook after the ftrace_ops is unregistered\n\nWhile running bpf selftests it\u0027s possible to get following fault:\n\n  general protection fault, probably for non-canonical address \\\n  0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC NOPTI\n  ...\n  Call Trace:\n   \u003cTASK\u003e\n   fprobe_handler+0xc1/0x270\n   ? __pfx_bpf_testmod_init+0x10/0x10\n   ? __pfx_bpf_testmod_init+0x10/0x10\n   ? bpf_fentry_test1+0x5/0x10\n   ? bpf_fentry_test1+0x5/0x10\n   ? bpf_testmod_init+0x22/0x80\n   ? do_one_initcall+0x63/0x2e0\n   ? rcu_is_watching+0xd/0x40\n   ? kmalloc_trace+0xaf/0xc0\n   ? do_init_module+0x60/0x250\n   ? __do_sys_finit_module+0xac/0x120\n   ? do_syscall_64+0x37/0x90\n   ? entry_SYSCALL_64_after_hwframe+0x72/0xdc\n   \u003c/TASK\u003e\n\nIn unregister_fprobe function we can\u0027t release fp-\u003erethook while it\u0027s\npossible there are some of its users still running on another cpu.\n\nMoving rethook_free call after fp-\u003eops is unregistered with\nunregister_ftrace_function call."
    }
  ],
  "id": "CVE-2023-53557",
  "lastModified": "2026-02-12T16:13:33.063",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-10-04T16:15:51.050",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/03d63255a5783243c110aec5e6ae2f1475c3be76"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5f81018753dfd4989e33ece1f0cb6b8aae498b82"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ce3ec57faff559ccae1e0150c1f077eb2df648a4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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