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CVE-2022-49801

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

tracing: Fix memory leak in tracing_read_pipe()

kmemleak reports this issue:

iter->fmt alloced in tracing_read_pipe() -> .. ->trace_iter_expand_format(), but not freed, to fix, add free in tracing_release_pipe()

Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xffff888105a18900 (size 128):
  comm "test_progs", pid 18933, jiffies 4336275356 (age 22801.766s)
  hex dump (first 32 bytes):
    25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04  %s......&...B.X.
    03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000560143a1>] __kmalloc_node_track_caller+0x4a/0x140
    [<000000006af00822>] krealloc+0x8d/0xf0
    [<00000000c309be6a>] trace_iter_expand_format+0x99/0x150
    [<000000005a53bdb6>] trace_check_vprintf+0x1e0/0x11d0
    [<0000000065629d9d>] trace_event_printf+0xb6/0xf0
    [<000000009a690dc7>] trace_raw_output_bpf_trace_printk+0x89/0xc0
    [<00000000d22db172>] print_trace_line+0x73c/0x1480
    [<00000000cdba76ba>] tracing_read_pipe+0x45c/0x9f0
    [<0000000015b58459>] vfs_read+0x17b/0x7c0
    [<000000004aeee8ed>] ksys_read+0xed/0x1c0
    [<0000000063d3d898>] do_syscall_64+0x3b/0x90
    [<00000000a06dda7f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2022-49801",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "versionType": "git"
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              "lessThan": "5.11",
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          ],
          "programFiles": [
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          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "version": "5.15.80",
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            {
              "status": "unaffected",
              "version": "6.0.10",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/trace/trace.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-05-01T15:16:03.407",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2c21ee020ce43d744ecd7f3e9bddfcaafef270ce",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/649e72070cbbb8600eb823833e4748f5a0815116",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "tags": [
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      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak in tracing_read_pipe()\n\nkmemleak reports this issue:\n\nunreferenced object 0xffff888105a18900 (size 128):\n  comm \"test_progs\", pid 18933, jiffies 4336275356 (age 22801.766s)\n  hex dump (first 32 bytes):\n    25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04  %s......&...B.X.\n    03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [<00000000560143a1>] __kmalloc_node_track_caller+0x4a/0x140\n    [<000000006af00822>] krealloc+0x8d/0xf0\n    [<00000000c309be6a>] trace_iter_expand_format+0x99/0x150\n    [<000000005a53bdb6>] trace_check_vprintf+0x1e0/0x11d0\n    [<0000000065629d9d>] trace_event_printf+0xb6/0xf0\n    [<000000009a690dc7>] trace_raw_output_bpf_trace_printk+0x89/0xc0\n    [<00000000d22db172>] print_trace_line+0x73c/0x1480\n    [<00000000cdba76ba>] tracing_read_pipe+0x45c/0x9f0\n    [<0000000015b58459>] vfs_read+0x17b/0x7c0\n    [<000000004aeee8ed>] ksys_read+0xed/0x1c0\n    [<0000000063d3d898>] do_syscall_64+0x3b/0x90\n    [<00000000a06dda7f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\niter->fmt alloced in\n  tracing_read_pipe() -> .. ->trace_iter_expand_format(), but not\nfreed, to fix, add free in tracing_release_pipe()"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing: Fix memory leakage in tracing_read_pipe() kmemleak informa de este problema: unreferenced object 0xffff888105a18900 (size 128): comm \"test_progs\", pid 18933, jiffies 4336275356 (age 22801.766s) hex dump (first 32 bytes): 25 73 00 90 81 88 ff ff 26 05 00 00 42 01 58 04 %s......&amp;...BX 03 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [&lt;00000000560143a1&gt;] __kmalloc_nodo_rastreador_llamador+0x4a/0x140 [&lt;000000006af00822&gt;] krealloc+0x8d/0xf0 [&lt;00000000c309be6a&gt;] trace_iter_expand_format+0x99/0x150 [&lt;000000005a53bdb6&gt;] trace_check_vprintf+0x1e0/0x11d0 [&lt;0000000065629d9d&gt;] trace_event_printf+0xb6/0xf0 [&lt;000000009a690dc7&gt;] trace_raw_output_bpf_trace_printk+0x89/0xc0 [&lt;00000000d22db172&gt;] imprimir_línea_de_seguimiento+0x73c/0x1480 [&lt;00000000cdba76ba&gt;] conducto_de_lectura_de_seguimiento+0x45c/0x9f0 [&lt;0000000015b58459&gt;] lectura_vfs+0x17b/0x7c0 [&lt;000000004aeee8ed&gt;] lectura_ksys+0xed/0x1c0 [&lt;0000000063d3d898&gt;] hacer_llamada_al_sistema_64+0x3b/0x90 [&lt;00000000a06dda7f&gt;] entrada_SYSCALL_64_después_de_hwframe+0x63/0xcd iter-&gt;fmt asignado en conducto_de_lectura_de_seguimiento() -&gt; .. -&gt;trace_iter_expand_format(), pero no se libera, para solucionarlo, agregue free en tracing_release_pipe()"
    }
  ],
  "lastModified": "2026-06-17T05:19:10.737",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6411F9A9-08F6-4422-86BF-B6B5AEE55AF1",
              "versionEndExcluding": "5.11",
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            {
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}