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CVE-2023-54171 (GCVE-0-2023-54171)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:08 – Updated: 2026-05-11 19:56
VLAI
Title
tracing: Fix memory leak of iter->temp when reading trace_pipe
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix memory leak of iter->temp when reading trace_pipe kmemleak reports: unreferenced object 0xffff88814d14e200 (size 256): comm "cat", pid 336, jiffies 4294871818 (age 779.490s) hex dump (first 32 bytes): 04 00 01 03 00 00 00 00 08 00 00 00 00 00 00 00 ................ 0c d8 c8 9b ff ff ff ff 04 5a ca 9b ff ff ff ff .........Z...... backtrace: [<ffffffff9bdff18f>] __kmalloc+0x4f/0x140 [<ffffffff9bc9238b>] trace_find_next_entry+0xbb/0x1d0 [<ffffffff9bc9caef>] trace_print_lat_context+0xaf/0x4e0 [<ffffffff9bc94490>] print_trace_line+0x3e0/0x950 [<ffffffff9bc95499>] tracing_read_pipe+0x2d9/0x5a0 [<ffffffff9bf03a43>] vfs_read+0x143/0x520 [<ffffffff9bf04c2d>] ksys_read+0xbd/0x160 [<ffffffff9d0f0edf>] do_syscall_64+0x3f/0x90 [<ffffffff9d2000aa>] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 when reading file 'trace_pipe', 'iter->temp' is allocated or relocated in trace_find_next_entry() but not freed before 'trace_pipe' is closed. To fix it, free 'iter->temp' in tracing_release_pipe().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ff895103a84abc85a5f43ecabc7f67cf36e1348f , < 1a1e793e021d75cd0accd8f329ec9456e5cd105e (git)
Affected: ff895103a84abc85a5f43ecabc7f67cf36e1348f , < 954792db9f61b6c0b8a94b8831fed5f146014029 (git)
Affected: ff895103a84abc85a5f43ecabc7f67cf36e1348f , < be970e22c53d5572b2795b79da9716ada937023b (git)
Affected: ff895103a84abc85a5f43ecabc7f67cf36e1348f , < 3f42d57a76e7e96585f08855554e002218cbca0c (git)
Affected: ff895103a84abc85a5f43ecabc7f67cf36e1348f , < d5a821896360cc8b93a15bd888fabc858c038dc0 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.188 , ≤ 5.10.* (semver)
Unaffected: 5.15.121 , ≤ 5.15.* (semver)
Unaffected: 6.1.40 , ≤ 6.1.* (semver)
Unaffected: 6.4.5 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak of iter-\u003etemp when reading trace_pipe\n\nkmemleak reports:\n  unreferenced object 0xffff88814d14e200 (size 256):\n    comm \"cat\", pid 336, jiffies 4294871818 (age 779.490s)\n    hex dump (first 32 bytes):\n      04 00 01 03 00 00 00 00 08 00 00 00 00 00 00 00  ................\n      0c d8 c8 9b ff ff ff ff 04 5a ca 9b ff ff ff ff  .........Z......\n    backtrace:\n      [\u003cffffffff9bdff18f\u003e] __kmalloc+0x4f/0x140\n      [\u003cffffffff9bc9238b\u003e] trace_find_next_entry+0xbb/0x1d0\n      [\u003cffffffff9bc9caef\u003e] trace_print_lat_context+0xaf/0x4e0\n      [\u003cffffffff9bc94490\u003e] print_trace_line+0x3e0/0x950\n      [\u003cffffffff9bc95499\u003e] tracing_read_pipe+0x2d9/0x5a0\n      [\u003cffffffff9bf03a43\u003e] vfs_read+0x143/0x520\n      [\u003cffffffff9bf04c2d\u003e] ksys_read+0xbd/0x160\n      [\u003cffffffff9d0f0edf\u003e] do_syscall_64+0x3f/0x90\n      [\u003cffffffff9d2000aa\u003e] entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nwhen reading file \u0027trace_pipe\u0027, \u0027iter-\u003etemp\u0027 is allocated or relocated\nin trace_find_next_entry() but not freed before \u0027trace_pipe\u0027 is closed.\n\nTo fix it, free \u0027iter-\u003etemp\u0027 in tracing_release_pipe()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:56:49.388Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/1a1e793e021d75cd0accd8f329ec9456e5cd105e"
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        {
          "url": "https://git.kernel.org/stable/c/d5a821896360cc8b93a15bd888fabc858c038dc0"
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    "cveId": "CVE-2023-54171",
    "datePublished": "2025-12-30T12:08:45.441Z",
    "dateReserved": "2025-12-30T12:06:44.496Z",
    "dateUpdated": "2026-05-11T19:56:49.388Z",
    "state": "PUBLISHED"
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak of iter-\u003etemp when reading trace_pipe\n\nkmemleak reports:\n  unreferenced object 0xffff88814d14e200 (size 256):\n    comm \"cat\", pid 336, jiffies 4294871818 (age 779.490s)\n    hex dump (first 32 bytes):\n      04 00 01 03 00 00 00 00 08 00 00 00 00 00 00 00  ................\n      0c d8 c8 9b ff ff ff ff 04 5a ca 9b ff ff ff ff  .........Z......\n    backtrace:\n      [\u003cffffffff9bdff18f\u003e] __kmalloc+0x4f/0x140\n      [\u003cffffffff9bc9238b\u003e] trace_find_next_entry+0xbb/0x1d0\n      [\u003cffffffff9bc9caef\u003e] trace_print_lat_context+0xaf/0x4e0\n      [\u003cffffffff9bc94490\u003e] print_trace_line+0x3e0/0x950\n      [\u003cffffffff9bc95499\u003e] tracing_read_pipe+0x2d9/0x5a0\n      [\u003cffffffff9bf03a43\u003e] vfs_read+0x143/0x520\n      [\u003cffffffff9bf04c2d\u003e] ksys_read+0xbd/0x160\n      [\u003cffffffff9d0f0edf\u003e] do_syscall_64+0x3f/0x90\n      [\u003cffffffff9d2000aa\u003e] entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\nwhen reading file \u0027trace_pipe\u0027, \u0027iter-\u003etemp\u0027 is allocated or relocated\nin trace_find_next_entry() but not freed before \u0027trace_pipe\u0027 is closed.\n\nTo fix it, free \u0027iter-\u003etemp\u0027 in tracing_release_pipe()."
          }
        ],
        "id": "CVE-2023-54171",
        "lastModified": "2026-06-17T06:46:56.093",
        "metrics": {},
        "published": "2025-12-30T13:16:04.940",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1a1e793e021d75cd0accd8f329ec9456e5cd105e"
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:25:32+00:00",
      "cve": "CVE-2023-54171",
      "id": "CVE-2023-54171",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "108",
      "product_status:known_not_affected": "166",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing: Fix memory leak of iter-\u003etemp when reading trace_pipe",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54171.json",
      "version": "3"
    }
  }
}



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