{"id":"CVE-2023-53557","revision":null,"records":[{"revision":"1fc9314feb6843adb97f1293e9e13b85","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53557","aliases":[],"title":"fprobe: Release rethook after the ftrace_ops is unregistered","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfprobe: Release rethook after the ftrace_ops is unregistered\n\nWhile running bpf selftests it's possible to get following fault:\n\n general protection fault, probably for non-canonical address \\\n 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC NOPTI\n ...\n Call Trace:\n \n fprobe_handler+0xc1/0x270\n ? __pfx_bpf_testmod_init+0x10/0x10\n ? __pfx_bpf_testmod_init+0x10/0x10\n ? bpf_fentry_test1+0x5/0x10\n ? bpf_fentry_test1+0x5/0x10\n ? bpf_testmod_init+0x22/0x80\n ? do_one_initcall+0x63/0x2e0\n ? rcu_is_watching+0xd/0x40\n ? kmalloc_trace+0xaf/0xc0\n ? do_init_module+0x60/0x250\n ? __do_sys_finit_module+0xac/0x120\n ? do_syscall_64+0x37/0x90\n ? entry_SYSCALL_64_after_hwframe+0x72/0xdc\n \n\nIn unregister_fprobe function we can't release fp->rethook while it's\npossible there are some of its users still running on another cpu.\n\nMoving rethook_free call after fp->ops is unregistered with\nunregister_ftrace_function call.","state":0,"publishedAt":"2025-10-04T15:17:02.077+00:00","modifiedAt":"2026-10-15T21:41:30.54+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"kernel/trace/fprobe.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5b0ab78998e32564a011b14c4c7f9c81e2d42b9d\",\n \"lessThan\": \"ce3ec57faff559ccae1e0150c1f077eb2df648a4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5b0ab78998e32564a011b14c4c7f9c81e2d42b9d\",\n \"lessThan\": \"03d63255a5783243c110aec5e6ae2f1475c3be76\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5b0ab78998e32564a011b14c4c7f9c81e2d42b9d\",\n \"lessThan\": \"5f81018753dfd4989e33ece1f0cb6b8aae498b82\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"kernel/trace/fprobe.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.18\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.18\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.40\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.4.5\",\n \"lessThanOrEqual\": \"6.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.5\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ce3ec57faff559ccae1e0150c1f077eb2df648a4","https://git.kernel.org/stable/c/03d63255a5783243c110aec5e6ae2f1475c3be76","https://git.kernel.org/stable/c/5f81018753dfd4989e33ece1f0cb6b8aae498b82"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53557","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53557","identifiers":["CVE-2023-53557"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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