{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49799", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-05-01T14:05:17.225Z", "datePublished": "2025-05-01T14:09:28.377Z", "dateUpdated": "2026-05-11T19:07:00.809Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:07:00.809Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix wild-memory-access in register_synth_event()\n\nIn register_synth_event(), if set_synth_event_print_fmt() failed, then\nboth trace_remove_event_call() and unregister_trace_event() will be\ncalled, which means the trace_event_call will call\n__unregister_trace_event() twice. As the result, the second unregister\nwill causes the wild-memory-access.\n\nregister_synth_event\n set_synth_event_print_fmt failed\n trace_remove_event_call\n event_remove\n if call->event.funcs then\n __unregister_trace_event (first call)\n unregister_trace_event\n __unregister_trace_event (second call)\n\nFix the bug by avoiding to call the second __unregister_trace_event() by\nchecking if the first one is called.\n\ngeneral protection fault, probably for non-canonical address\n\t0xfbd59c0000000024: 0000 [#1] SMP KASAN PTI\nKASAN: maybe wild-memory-access in range\n[0xdead000000000120-0xdead000000000127]\nCPU: 0 PID: 3807 Comm: modprobe Not tainted\n6.1.0-rc1-00186-g76f33a7eedb4 #299\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\nRIP: 0010:unregister_trace_event+0x6e/0x280\nCode: 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 0e 02 00 00 48\nb8 00 00 00 00 00 fc ff df 4c 8b 63 08 4c 89 e2 48 c1 ea 03 <80> 3c 02\n00 0f 85 e2 01 00 00 49 89 2c 24 48 85 ed 74 28 e8 7a 9b\nRSP: 0018:ffff88810413f370 EFLAGS: 00010a06\nRAX: dffffc0000000000 RBX: ffff888105d050b0 RCX: 0000000000000000\nRDX: 1bd5a00000000024 RSI: ffff888119e276e0 RDI: ffffffff835a8b20\nRBP: dead000000000100 R08: 0000000000000000 R09: fffffbfff0913481\nR10: ffffffff8489a407 R11: fffffbfff0913480 R12: dead000000000122\nR13: ffff888105d050b8 R14: 0000000000000000 R15: ffff888105d05028\nFS: 00007f7823e8d540(0000) GS:ffff888119e00000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f7823e7ebec CR3: 000000010a058002 CR4: 0000000000330ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \n __create_synth_event+0x1e37/0x1eb0\n create_or_delete_synth_event+0x110/0x250\n synth_event_run_command+0x2f/0x110\n test_gen_synth_cmd+0x170/0x2eb [synth_event_gen_test]\n synth_event_gen_test_init+0x76/0x9bc [synth_event_gen_test]\n do_one_initcall+0xdb/0x480\n do_init_module+0x1cf/0x680\n load_module+0x6a50/0x70a0\n __do_sys_finit_module+0x12f/0x1c0\n do_syscall_64+0x3f/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace_events_synth.c" ], "versions": [ { "version": "4b147936fa509650beaf638b331573c23ba4d609", "lessThan": "315b149f08229a233d47532eb5da1707b28f764c", "status": "affected", "versionType": "git" }, { "version": "4b147936fa509650beaf638b331573c23ba4d609", "lessThan": "6517b97134f724d12f673f9fb4f456d75c7a905f", "status": "affected", "versionType": "git" }, { "version": "4b147936fa509650beaf638b331573c23ba4d609", "lessThan": "a5bfa53e5036b3e7a80be902dd3719a930accabd", "status": "affected", "versionType": "git" }, { "version": "4b147936fa509650beaf638b331573c23ba4d609", "lessThan": "1b5f1c34d3f5a664a57a5a7557a50e4e3cc2505c", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/trace/trace_events_synth.c" ], "versions": [ { "version": "4.17", "status": "affected" }, { "version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.156", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.80", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.10", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.156" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.80" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/315b149f08229a233d47532eb5da1707b28f764c" }, { "url": "https://git.kernel.org/stable/c/6517b97134f724d12f673f9fb4f456d75c7a905f" }, { "url": "https://git.kernel.org/stable/c/a5bfa53e5036b3e7a80be902dd3719a930accabd" }, { "url": "https://git.kernel.org/stable/c/1b5f1c34d3f5a664a57a5a7557a50e4e3cc2505c" } ], "title": "tracing: Fix wild-memory-access in register_synth_event()", "x_generator": { "engine": "bippy-1.2.0" } } } }