{"id":"CVE-2022-49797","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:\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 assign…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < bb70fcae4115d24b7e8cee17a6da8b1943f546bb","Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < 3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332","Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d","Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < e0d75267f59d7084e0468bd68beeb1bf9c71d7c0","Linux 5.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:48:29.536913Z"},"published":"2025-05-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:49.309Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49797","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"}],"tags":["cve.org"],"epss":0.00202,"epssPercentile":0.10136,"ingestedAt":"2026-11-05T22:38:31.596Z","slug":"CVE-2022-49797","body":"## Overview\n\nIn 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\n\n## Affected\n\n- `Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < bb70fcae4115d24b7e8cee17a6da8b1943f546bb`\n- `Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < 3a41c0f2a5c3bf72b4c4e9dd4b1025378201e332`\n- `Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < fd0efd4f7bfe611a8339ba01bc2ac3c33e79159d`\n- `Linux >= 64836248dda20c8e7427b493f7e06d9bf8f58850 < e0d75267f59d7084e0468bd68beeb1bf9c71d7c0`\n- `Linux 5.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}