FKIE_CVE-2022-49891

Vulnerability from fkie_nvd - Published: 2025-05-01 15:16 - Updated: 2025-10-01 16:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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: tracing: kprobe: Fix memory leak in test_gen_kprobe/kretprobe_cmd() test_gen_kprobe_cmd() only free buf in fail path, hence buf will leak when there is no failure. Move kfree(buf) from fail path to common path to prevent the memleak. The same reason and solution in test_gen_kretprobe_cmd(). unreferenced object 0xffff888143b14000 (size 2048): comm "insmod", pid 52490, jiffies 4301890980 (age 40.553s) hex dump (first 32 bytes): 70 3a 6b 70 72 6f 62 65 73 2f 67 65 6e 5f 6b 70 p:kprobes/gen_kp 72 6f 62 65 5f 74 65 73 74 20 64 6f 5f 73 79 73 robe_test do_sys backtrace: [<000000006d7b836b>] kmalloc_trace+0x27/0xa0 [<0000000009528b5b>] 0xffffffffa059006f [<000000008408b580>] do_one_initcall+0x87/0x2a0 [<00000000c4980a7e>] do_init_module+0xdf/0x320 [<00000000d775aad0>] load_module+0x3006/0x3390 [<00000000e9a74b80>] __do_sys_finit_module+0x113/0x1b0 [<000000003726480d>] do_syscall_64+0x35/0x80 [<000000003441e93b>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66f0919c953ef7b55e5ab94389a013da2ce80a2cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/71aeb8d01a8c7ab5cf7da3f81b35206f56ce6bcaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bef08acbe560a926b4cee9cc46404cc98ae5703bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1b6a8e3414aeaa0985139180c145d2d0fbd2a49Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B0DA74CD-D573-4831-8842-4FBB6C0F49AA",
              "versionEndExcluding": "5.10.154",
              "versionStartIncluding": "5.6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AB8B27B9-B41B-42D5-AE67-0A89A8A8EEB1",
              "versionEndExcluding": "5.15.78",
              "versionStartIncluding": "5.11",
              "vulnerable": true
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EC9A754E-625D-42F3-87A7-960D643E2867",
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              "versionStartIncluding": "5.16",
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              "criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11",
              "vulnerable": true
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              "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705",
              "vulnerable": true
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              "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B",
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          "negate": false,
          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: kprobe: Fix memory leak in test_gen_kprobe/kretprobe_cmd()\n\ntest_gen_kprobe_cmd() only free buf in fail path, hence buf will leak\nwhen there is no failure. Move kfree(buf) from fail path to common path\nto prevent the memleak. The same reason and solution in\ntest_gen_kretprobe_cmd().\n\nunreferenced object 0xffff888143b14000 (size 2048):\n  comm \"insmod\", pid 52490, jiffies 4301890980 (age 40.553s)\n  hex dump (first 32 bytes):\n    70 3a 6b 70 72 6f 62 65 73 2f 67 65 6e 5f 6b 70  p:kprobes/gen_kp\n    72 6f 62 65 5f 74 65 73 74 20 64 6f 5f 73 79 73  robe_test do_sys\n  backtrace:\n    [\u003c000000006d7b836b\u003e] kmalloc_trace+0x27/0xa0\n    [\u003c0000000009528b5b\u003e] 0xffffffffa059006f\n    [\u003c000000008408b580\u003e] do_one_initcall+0x87/0x2a0\n    [\u003c00000000c4980a7e\u003e] do_init_module+0xdf/0x320\n    [\u003c00000000d775aad0\u003e] load_module+0x3006/0x3390\n    [\u003c00000000e9a74b80\u003e] __do_sys_finit_module+0x113/0x1b0\n    [\u003c000000003726480d\u003e] do_syscall_64+0x35/0x80\n    [\u003c000000003441e93b\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rastreo: kprobe: Se corrige la fuga de memoria en test_gen_kprobe/kretprobe_cmd(). test_gen_kprobe_cmd() solo libera b\u00fafer en la ruta de fallo, por lo que el b\u00fafer se filtrar\u00e1 cuando no haya fallo. Se traslada kfree(buf) de la ruta de fallo a la ruta com\u00fan para evitar la fuga de memoria. El mismo motivo y soluci\u00f3n se aplican en test_gen_kretprobe_cmd(). Objeto sin referencia 0xffff888143b14000 (size 2048): comm \"insmod\", pid 52490, jiffies 4301890980 (age 40.553s) hex dump (first 32 bytes): 70 3a 6b 70 72 6f 62 65 73 2f 67 65 6e 5f 6b 70 p:kprobes/gen_kp 72 6f 62 65 5f 74 65 73 74 20 64 6f 5f 73 79 73 robe_test do_sys backtrace: [\u0026lt;000000006d7b836b\u0026gt;] kmalloc_trace+0x27/0xa0 [\u0026lt;0000000009528b5b\u0026gt;] 0xffffffffa059006f [\u0026lt;000000008408b580\u0026gt;] do_one_initcall+0x87/0x2a0 [\u0026lt;00000000c4980a7e\u0026gt;] do_init_module+0xdf/0x320 [\u0026lt;00000000d775aad0\u0026gt;] load_module+0x3006/0x3390 [\u0026lt;00000000e9a74b80\u0026gt;] __do_sys_finit_module+0x113/0x1b0 [\u0026lt;000000003726480d\u0026gt;] do_syscall_64+0x35/0x80 [\u0026lt;000000003441e93b\u0026gt;] entry_SYSCALL_64_after_hwframe+0x46/0xb0 "
    }
  ],
  "id": "CVE-2022-49891",
  "lastModified": "2025-10-01T16:15:49.610",
  "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"
      },
      {
        "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-05-01T15:16:14.107",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/66f0919c953ef7b55e5ab94389a013da2ce80a2c"
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    {
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "url": "https://git.kernel.org/stable/c/d1b6a8e3414aeaa0985139180c145d2d0fbd2a49"
    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
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          "lang": "en",
          "value": "CWE-401"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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