CVE-2022-49800 (GCVE-0-2022-49800)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2025-05-04 08:45
VLAI?
Title
tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event() test_gen_synth_cmd() only free buf in fail path, hence buf will leak when there is no failure. Add kfree(buf) to prevent the memleak. The same reason and solution in test_empty_synth_event(). unreferenced object 0xffff8881127de000 (size 2048): comm "modprobe", pid 247, jiffies 4294972316 (age 78.756s) hex dump (first 32 bytes): 20 67 65 6e 5f 73 79 6e 74 68 5f 74 65 73 74 20 gen_synth_test 20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69 64 5f pid_t next_pid_ backtrace: [<000000004254801a>] kmalloc_trace+0x26/0x100 [<0000000039eb1cf5>] 0xffffffffa00083cd [<000000000e8c3bc8>] 0xffffffffa00086ba [<00000000c293d1ea>] do_one_initcall+0xdb/0x480 [<00000000aa189e6d>] do_init_module+0x1cf/0x680 [<00000000d513222b>] load_module+0x6a50/0x70a0 [<000000001fd4d529>] __do_sys_finit_module+0x12f/0x1c0 [<00000000b36c4c0f>] do_syscall_64+0x3f/0x90 [<00000000bbf20cf3>] entry_SYSCALL_64_after_hwframe+0x63/0xcd unreferenced object 0xffff8881127df000 (size 2048): comm "modprobe", pid 247, jiffies 4294972324 (age 78.728s) hex dump (first 32 bytes): 20 65 6d 70 74 79 5f 73 79 6e 74 68 5f 74 65 73 empty_synth_tes 74 20 20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69 t pid_t next_pi backtrace: [<000000004254801a>] kmalloc_trace+0x26/0x100 [<00000000d4db9a3d>] 0xffffffffa0008071 [<00000000c31354a5>] 0xffffffffa00086ce [<00000000c293d1ea>] do_one_initcall+0xdb/0x480 [<00000000aa189e6d>] do_init_module+0x1cf/0x680 [<00000000d513222b>] load_module+0x6a50/0x70a0 [<000000001fd4d529>] __do_sys_finit_module+0x12f/0x1c0 [<00000000b36c4c0f>] do_syscall_64+0x3f/0x90 [<00000000bbf20cf3>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9fe41efaca08416657efa8731c0d47ccb6a3f3eb , < 65ba7e7c241122ef0a9e61d1920f2ae9689aa796 (git)
Affected: 9fe41efaca08416657efa8731c0d47ccb6a3f3eb , < 07ba4f0603aba288580866394f2916dfe55823a2 (git)
Affected: 9fe41efaca08416657efa8731c0d47ccb6a3f3eb , < 0e5baaa181a052d968701bb9c5b1d55847f00942 (git)
Affected: 9fe41efaca08416657efa8731c0d47ccb6a3f3eb , < a4527fef9afe5c903c718d0cd24609fe9c754250 (git)
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    Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.156 , ≤ 5.10.* (semver)
Unaffected: 5.15.80 , ≤ 5.15.* (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/synth_event_gen_test.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "65ba7e7c241122ef0a9e61d1920f2ae9689aa796",
              "status": "affected",
              "version": "9fe41efaca08416657efa8731c0d47ccb6a3f3eb",
              "versionType": "git"
            },
            {
              "lessThan": "07ba4f0603aba288580866394f2916dfe55823a2",
              "status": "affected",
              "version": "9fe41efaca08416657efa8731c0d47ccb6a3f3eb",
              "versionType": "git"
            },
            {
              "lessThan": "0e5baaa181a052d968701bb9c5b1d55847f00942",
              "status": "affected",
              "version": "9fe41efaca08416657efa8731c0d47ccb6a3f3eb",
              "versionType": "git"
            },
            {
              "lessThan": "a4527fef9afe5c903c718d0cd24609fe9c754250",
              "status": "affected",
              "version": "9fe41efaca08416657efa8731c0d47ccb6a3f3eb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/synth_event_gen_test.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.156",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.156",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.80",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.10",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()\n\ntest_gen_synth_cmd() only free buf in fail path, hence buf will leak\nwhen there is no failure. Add kfree(buf) to prevent the memleak. The\nsame reason and solution in test_empty_synth_event().\n\nunreferenced object 0xffff8881127de000 (size 2048):\n  comm \"modprobe\", pid 247, jiffies 4294972316 (age 78.756s)\n  hex dump (first 32 bytes):\n    20 67 65 6e 5f 73 79 6e 74 68 5f 74 65 73 74 20   gen_synth_test\n    20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69 64 5f   pid_t next_pid_\n  backtrace:\n    [\u003c000000004254801a\u003e] kmalloc_trace+0x26/0x100\n    [\u003c0000000039eb1cf5\u003e] 0xffffffffa00083cd\n    [\u003c000000000e8c3bc8\u003e] 0xffffffffa00086ba\n    [\u003c00000000c293d1ea\u003e] do_one_initcall+0xdb/0x480\n    [\u003c00000000aa189e6d\u003e] do_init_module+0x1cf/0x680\n    [\u003c00000000d513222b\u003e] load_module+0x6a50/0x70a0\n    [\u003c000000001fd4d529\u003e] __do_sys_finit_module+0x12f/0x1c0\n    [\u003c00000000b36c4c0f\u003e] do_syscall_64+0x3f/0x90\n    [\u003c00000000bbf20cf3\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd\nunreferenced object 0xffff8881127df000 (size 2048):\n  comm \"modprobe\", pid 247, jiffies 4294972324 (age 78.728s)\n  hex dump (first 32 bytes):\n    20 65 6d 70 74 79 5f 73 79 6e 74 68 5f 74 65 73   empty_synth_tes\n    74 20 20 70 69 64 5f 74 20 6e 65 78 74 5f 70 69  t  pid_t next_pi\n  backtrace:\n    [\u003c000000004254801a\u003e] kmalloc_trace+0x26/0x100\n    [\u003c00000000d4db9a3d\u003e] 0xffffffffa0008071\n    [\u003c00000000c31354a5\u003e] 0xffffffffa00086ce\n    [\u003c00000000c293d1ea\u003e] do_one_initcall+0xdb/0x480\n    [\u003c00000000aa189e6d\u003e] do_init_module+0x1cf/0x680\n    [\u003c00000000d513222b\u003e] load_module+0x6a50/0x70a0\n    [\u003c000000001fd4d529\u003e] __do_sys_finit_module+0x12f/0x1c0\n    [\u003c00000000b36c4c0f\u003e] do_syscall_64+0x3f/0x90\n    [\u003c00000000bbf20cf3\u003e] entry_SYSCALL_64_after_hwframe+0x63/0xcd"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:45:37.373Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/65ba7e7c241122ef0a9e61d1920f2ae9689aa796"
        },
        {
          "url": "https://git.kernel.org/stable/c/07ba4f0603aba288580866394f2916dfe55823a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/0e5baaa181a052d968701bb9c5b1d55847f00942"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4527fef9afe5c903c718d0cd24609fe9c754250"
        }
      ],
      "title": "tracing: Fix memory leak in test_gen_synth_cmd() and test_empty_synth_event()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49800",
    "datePublished": "2025-05-01T14:09:29.042Z",
    "dateReserved": "2025-05-01T14:05:17.225Z",
    "dateUpdated": "2025-05-04T08:45:37.373Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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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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