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CVE-2022-49797 (GCVE-0-2022-49797)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:06
VLAI
Title
tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit() When trace_get_event_file() failed, gen_kretprobe_test will be assigned as the error code. If module kprobe_event_gen_test is removed now, the null pointer dereference will happen in kprobe_event_gen_test_exit(). Check if gen_kprobe_test or gen_kretprobe_test is error code or NULL before dereference them. BUG: kernel NULL pointer dereference, address: 0000000000000012 PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 3 PID: 2210 Comm: modprobe Not tainted 6.1.0-rc1-00171-g2159299a3b74-dirty #217 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 RIP: 0010:kprobe_event_gen_test_exit+0x1c/0xb5 [kprobe_event_gen_test] Code: Unable to access opcode bytes at 0xffffffff9ffffff2. RSP: 0018:ffffc900015bfeb8 EFLAGS: 00010246 RAX: ffffffffffffffea RBX: ffffffffa0002080 RCX: 0000000000000000 RDX: ffffffffa0001054 RSI: ffffffffa0001064 RDI: ffffffffdfc6349c RBP: ffffffffa0000000 R08: 0000000000000004 R09: 00000000001e95c0 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000800 R13: ffffffffa0002420 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f56b75be540(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff9ffffff2 CR3: 000000010874a006 CR4: 0000000000330ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __x64_sys_delete_module+0x206/0x380 ? lockdep_hardirqs_on_prepare+0xd8/0x190 ? syscall_enter_from_user_mode+0x1c/0x50 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 64836248dda20c8e7427b493f7e06d9bf8f58850 , < bb70fcae4115d24b7e8cee17a6da8b1943f546bb (git)
Affected: 64836248dda20c8e7427b493f7e06d9bf8f58850 , < 3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332 (git)
Affected: 64836248dda20c8e7427b493f7e06d9bf8f58850 , < fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d (git)
Affected: 64836248dda20c8e7427b493f7e06d9bf8f58850 , < e0d75267f59d7084e0468bd68beeb1bf9c71d7c0 (git)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/kprobe_event_gen_test.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "versionType": "semver"
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            }
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()\n\nWhen trace_get_event_file() failed, gen_kretprobe_test will be assigned\nas the error code. If module kprobe_event_gen_test is removed now, the\nnull pointer dereference will happen in kprobe_event_gen_test_exit().\nCheck if gen_kprobe_test or gen_kretprobe_test is error code or NULL\nbefore dereference them.\n\nBUG: kernel NULL pointer dereference, address: 0000000000000012\nPGD 0 P4D 0\nOops: 0000 [#1] SMP PTI\nCPU: 3 PID: 2210 Comm: modprobe Not tainted\n6.1.0-rc1-00171-g2159299a3b74-dirty #217\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\nRIP: 0010:kprobe_event_gen_test_exit+0x1c/0xb5 [kprobe_event_gen_test]\nCode: Unable to access opcode bytes at 0xffffffff9ffffff2.\nRSP: 0018:ffffc900015bfeb8 EFLAGS: 00010246\nRAX: ffffffffffffffea RBX: ffffffffa0002080 RCX: 0000000000000000\nRDX: ffffffffa0001054 RSI: ffffffffa0001064 RDI: ffffffffdfc6349c\nRBP: ffffffffa0000000 R08: 0000000000000004 R09: 00000000001e95c0\nR10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000800\nR13: ffffffffa0002420 R14: 0000000000000000 R15: 0000000000000000\nFS:  00007f56b75be540(0000) GS:ffff88813bc00000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffffffff9ffffff2 CR3: 000000010874a006 CR4: 0000000000330ee0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n __x64_sys_delete_module+0x206/0x380\n ? lockdep_hardirqs_on_prepare+0xd8/0x190\n ? syscall_enter_from_user_mode+0x1c/0x50\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:06:58.372Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/bb70fcae4115d24b7e8cee17a6da8b1943f546bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0d75267f59d7084e0468bd68beeb1bf9c71d7c0"
        }
      ],
      "title": "tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49797",
    "datePublished": "2025-05-01T14:09:26.998Z",
    "dateReserved": "2025-05-01T14:05:17.224Z",
    "dateUpdated": "2026-05-11T19:06:58.372Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49797",
      "date": "2026-09-16",
      "epss": "0.00193",
      "percentile": "0.09225"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49797\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:02.990\",\"lastModified\":\"2026-06-17T05:19:10.240\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()\\n\\nWhen trace_get_event_file() failed, gen_kretprobe_test will be assigned\\nas the error code. If module kprobe_event_gen_test is removed now, the\\nnull pointer dereference will happen in kprobe_event_gen_test_exit().\\nCheck if gen_kprobe_test or gen_kretprobe_test is error code or NULL\\nbefore dereference them.\\n\\nBUG: kernel NULL pointer dereference, address: 0000000000000012\\nPGD 0 P4D 0\\nOops: 0000 [#1] SMP PTI\\nCPU: 3 PID: 2210 Comm: modprobe Not tainted\\n6.1.0-rc1-00171-g2159299a3b74-dirty #217\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:kprobe_event_gen_test_exit+0x1c/0xb5 [kprobe_event_gen_test]\\nCode: Unable to access opcode bytes at 0xffffffff9ffffff2.\\nRSP: 0018:ffffc900015bfeb8 EFLAGS: 00010246\\nRAX: ffffffffffffffea RBX: ffffffffa0002080 RCX: 0000000000000000\\nRDX: ffffffffa0001054 RSI: ffffffffa0001064 RDI: ffffffffdfc6349c\\nRBP: ffffffffa0000000 R08: 0000000000000004 R09: 00000000001e95c0\\nR10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000800\\nR13: ffffffffa0002420 R14: 0000000000000000 R15: 0000000000000000\\nFS:  00007f56b75be540(0000) GS:ffff88813bc00000(0000)\\nknlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: ffffffff9ffffff2 CR3: 000000010874a006 CR4: 0000000000330ee0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n __x64_sys_delete_module+0x206/0x380\\n ? lockdep_hardirqs_on_prepare+0xd8/0x190\\n ? syscall_enter_from_user_mode+0x1c/0x50\\n do_syscall_64+0x3f/0x90\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tracing: kprobe: Se corrige la posible desreferencia de puntero nulo en trace_event_file en kprobe_event_gen_test_exit(). Cuando trace_get_event_file() falla, se asigna gen_kretprobe_test como c\u00f3digo de error. Si se elimina el m\u00f3dulo kprobe_event_gen_test, se producir\u00e1 la desreferencia de puntero nulo en kprobe_event_gen_test_exit(). Compruebe si gen_kprobe_test o gen_kretprobe_test son c\u00f3digos de error o nulos antes de desreferenciarlos. ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000012 PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 3 PID: 2210 Comm: modprobe No contaminado 6.1.0-rc1-00171-g2159299a3b74-dirty #217 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 RIP: 0010:kprobe_event_gen_test_exit+0x1c/0xb5 [kprobe_event_gen_test] C\u00f3digo: No se puede acceder a los bytes del c\u00f3digo de operaci\u00f3n en 0xffffffff9ffffff2. RSP: 0018:ffffc900015bfeb8 EFLAGS: 00010246 RAX: ffffffffffffffea RBX: ffffffffa0002080 RCX: 000000000000000 RDX: ffffffffa0001054 RSI: ffffffffa0001064 RDI: ffffffffdfc6349c RBP: ffffffffa0000000 R08: 000000000000004 R09: 00000000001e95c0 R10: 000000000000000 R11: 000000000000001 R12: 0000000000000800 R13: ffffffffa0002420 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f56b75be540(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff9ffffff2 CR3: 000000010874a006 CR4: 0000000000330ee0 DR0: 00000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 000000000fffe0ff0 DR7: 0000000000000400 Rastreo de llamadas:  __x64_sys_delete_module+0x206/0x380 ? lockdep_hardirqs_on_prepare+0xd8/0x190 ? syscall_enter_from_user_mode+0x1c/0x50 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/trace/kprobe_event_gen_test.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"64836248dda20c8e7427b493f7e06d9bf8f58850\",\"lessThan\":\"bb70fcae4115d24b7e8cee17a6da8b1943f546bb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"64836248dda20c8e7427b493f7e06d9bf8f58850\",\"lessThan\":\"3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"64836248dda20c8e7427b493f7e06d9bf8f58850\",\"lessThan\":\"fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"64836248dda20c8e7427b493f7e06d9bf8f58850\",\"lessThan\":\"e0d75267f59d7084e0468bd68beeb1bf9c71d7c0\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/trace/kprobe_event_gen_test.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.156\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.80\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.10\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.6\",\"versionEndExcluding\":\"5.10.156\",\"matchCriteriaId\":\"45E305F2-A5CD-4E1F-B66F-77300B3EC524\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.80\",\"matchCriteriaId\":\"51BBEF3B-79F5-4D4C-ADBA-F34DA0E2465C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.10\",\"matchCriteriaId\":\"64F9ADD1-3ADB-4D66-A00F-4A83010B05F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E7E331DA-1FB0-4DEC-91AC-7DA69D461C11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"17F0B248-42CF-4AE6-A469-BB1BAE7F4705\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E2422816-0C14-4B5E-A1E6-A9D776E5C49B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"35B26BE4-43A6-4A36-A7F6-5B3F572D9186\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bb70fcae4115d24b7e8cee17a6da8b1943f546bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e0d75267f59d7084e0468bd68beeb1bf9c71d7c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:17:58+00:00",
      "cve": "CVE-2022-49797",
      "id": "CVE-2022-49797",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "108",
      "product_status:known_not_affected": "166",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49797.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:25:26Z",
      "cve": "CVE-2022-49797",
      "id": "CVE-2022-49797",
      "initial_release_date": "2025-05-06T03:07:31Z",
      "product_status:known_affected": "339",
      "product_status:known_not_affected": "386",
      "product_status:recommended": "214",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49797",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49797.json",
      "version": "41"
    }
  }
}



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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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.