cve-2022-49802
Vulnerability from cvelistv5
Published
2025-05-01 14:09
Modified
2025-05-01 14:09
Severity ?
Summary
ftrace: Fix null pointer dereference in ftrace_add_mod()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bea037a1abb23a6729bef36a2265a4565f5ea77
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/665b4c6648bf2b91f69b33817f4321cf4c3cafe9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a14828caddad0d989495a72af678adf60992704
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e50eb4b1807017f6c2d5089064256ce2de8aef1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5bfc61f541d3f092b13dedcfe000d86eb8e133c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f715f31559b82e3f75ce047fa476de63d8107584
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/ftrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "665b4c6648bf2b91f69b33817f4321cf4c3cafe9",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            },
            {
              "lessThan": "b5bfc61f541d3f092b13dedcfe000d86eb8e133c",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            },
            {
              "lessThan": "f715f31559b82e3f75ce047fa476de63d8107584",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            },
            {
              "lessThan": "6a14828caddad0d989495a72af678adf60992704",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            },
            {
              "lessThan": "1bea037a1abb23a6729bef36a2265a4565f5ea77",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            },
            {
              "lessThan": "6e50eb4b1807017f6c2d5089064256ce2de8aef1",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            },
            {
              "lessThan": "19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0",
              "status": "affected",
              "version": "673feb9d76ab3eddde7acfd94b206e321cfc90b9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/ftrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.13"
            },
            {
              "lessThan": "4.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.300",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.267",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.225",
              "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"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix null pointer dereference in ftrace_add_mod()\n\nThe @ftrace_mod is allocated by kzalloc(), so both the members {prev,next}\nof @ftrace_mode-\u003elist are NULL, it\u0027s not a valid state to call list_del().\nIf kstrdup() for @ftrace_mod-\u003e{func|module} fails, it goes to @out_free\ntag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del()\nwill write prev-\u003enext and next-\u003eprev, where null pointer dereference\nhappens.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nOops: 0002 [#1] PREEMPT SMP NOPTI\nCall Trace:\n \u003cTASK\u003e\n ftrace_mod_callback+0x20d/0x220\n ? do_filp_open+0xd9/0x140\n ftrace_process_regex.isra.51+0xbf/0x130\n ftrace_regex_write.isra.52.part.53+0x6e/0x90\n vfs_write+0xee/0x3a0\n ? __audit_filter_op+0xb1/0x100\n ? auditd_test_task+0x38/0x50\n ksys_write+0xa5/0xe0\n do_syscall_64+0x3a/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nKernel panic - not syncing: Fatal exception\n\nSo call INIT_LIST_HEAD() to initialize the list member to fix this issue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-01T14:09:30.308Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/665b4c6648bf2b91f69b33817f4321cf4c3cafe9"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5bfc61f541d3f092b13dedcfe000d86eb8e133c"
        },
        {
          "url": "https://git.kernel.org/stable/c/f715f31559b82e3f75ce047fa476de63d8107584"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a14828caddad0d989495a72af678adf60992704"
        },
        {
          "url": "https://git.kernel.org/stable/c/1bea037a1abb23a6729bef36a2265a4565f5ea77"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e50eb4b1807017f6c2d5089064256ce2de8aef1"
        },
        {
          "url": "https://git.kernel.org/stable/c/19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0"
        }
      ],
      "title": "ftrace: Fix null pointer dereference in ftrace_add_mod()",
      "x_generator": {
        "engine": "bippy-1.1.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49802",
    "datePublished": "2025-05-01T14:09:30.308Z",
    "dateReserved": "2025-05-01T14:05:17.225Z",
    "dateUpdated": "2025-05-01T14:09:30.308Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49802\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:03.510\",\"lastModified\":\"2025-05-01T15:16:03.510\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nftrace: Fix null pointer dereference in ftrace_add_mod()\\n\\nThe @ftrace_mod is allocated by kzalloc(), so both the members {prev,next}\\nof @ftrace_mode-\u003elist are NULL, it\u0027s not a valid state to call list_del().\\nIf kstrdup() for @ftrace_mod-\u003e{func|module} fails, it goes to @out_free\\ntag and calls free_ftrace_mod() to destroy @ftrace_mod, then list_del()\\nwill write prev-\u003enext and next-\u003eprev, where null pointer dereference\\nhappens.\\n\\nBUG: kernel NULL pointer dereference, address: 0000000000000008\\nOops: 0002 [#1] PREEMPT SMP NOPTI\\nCall Trace:\\n \u003cTASK\u003e\\n ftrace_mod_callback+0x20d/0x220\\n ? do_filp_open+0xd9/0x140\\n ftrace_process_regex.isra.51+0xbf/0x130\\n ftrace_regex_write.isra.52.part.53+0x6e/0x90\\n vfs_write+0xee/0x3a0\\n ? __audit_filter_op+0xb1/0x100\\n ? auditd_test_task+0x38/0x50\\n ksys_write+0xa5/0xe0\\n do_syscall_64+0x3a/0x90\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\nKernel panic - not syncing: Fatal exception\\n\\nSo call INIT_LIST_HEAD() to initialize the list member to fix this issue.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19ba6c8af9382c4c05dc6a0a79af3013b9a35cd0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1bea037a1abb23a6729bef36a2265a4565f5ea77\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/665b4c6648bf2b91f69b33817f4321cf4c3cafe9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a14828caddad0d989495a72af678adf60992704\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6e50eb4b1807017f6c2d5089064256ce2de8aef1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b5bfc61f541d3f092b13dedcfe000d86eb8e133c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f715f31559b82e3f75ce047fa476de63d8107584\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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