{"id":"CVE-2022-49797","state":"PUBLISHED","title":"tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()","description":"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 <TASK>\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","publishedAt":"2025-05-01T14:09:26.998Z","updatedAt":"2026-05-11T19:06:58.372Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"bb70fcae4115d24b7e8cee17a6da8b1943f546bb","versionType":"git"},{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332","versionType":"git"},{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d","versionType":"git"},{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"e0d75267f59d7084e0468bd68beeb1bf9c71d7c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/kprobe_event_gen_test.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.10.156","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.80","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.10","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/kprobe_event_gen_test.c"]}],"references":["https://git.kernel.org/stable/c/bb70fcae4115d24b7e8cee17a6da8b1943f546bb","https://git.kernel.org/stable/c/3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332","https://git.kernel.org/stable/c/fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d","https://git.kernel.org/stable/c/e0d75267f59d7084e0468bd68beeb1bf9c71d7c0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49797.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49797","state":"PUBLISHED","datePublished":"2025-05-01T14:09:26.998Z","dateUpdated":"2026-05-11T19:06:58.372Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-05-01T14:05:17.224Z"},"containers":{"cna":{"title":"tracing: kprobe: Fix potential null-ptr-deref on trace_event_file in kprobe_event_gen_test_exit()","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 <TASK>\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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"bb70fcae4115d24b7e8cee17a6da8b1943f546bb","versionType":"git"},{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332","versionType":"git"},{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d","versionType":"git"},{"version":"64836248dda20c8e7427b493f7e06d9bf8f58850","status":"affected","lessThan":"e0d75267f59d7084e0468bd68beeb1bf9c71d7c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/kprobe_event_gen_test.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"5.10.156","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.80","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.10","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/kprobe_event_gen_test.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:06:58.372Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.10.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"5.15.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}