{"id":"CVE-2025-39683","revision":"be816da638144e8b8c74248aeec95f7c","records":[{"revision":"be816da638144e8b8c74248aeec95f7c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-39683","aliases":[],"title":"tracing: Limit access to parser->buffer when trace_get_user failed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Limit access to parser->buffer when trace_get_user failed\n\nWhen the length of the string written to set_ftrace_filter exceeds\nFTRACE_BUFF_MAX, the following KASAN alarm will be triggered:\n\nBUG: KASAN: slab-out-of-bounds in strsep+0x18c/0x1b0\nRead of size 1 at addr ffff0000d00bd5ba by task ash/165\n\nCPU: 1 UID: 0 PID: 165 Comm: ash Not tainted 6.16.0-g6bcdbd62bd56-dirty\nHardware name: linux,dummy-virt (DT)\nCall trace:\n show_stack+0x34/0x50 (C)\n dump_stack_lvl+0xa0/0x158\n print_address_description.constprop.0+0x88/0x398\n print_report+0xb0/0x280\n kasan_report+0xa4/0xf0\n __asan_report_load1_noabort+0x20/0x30\n strsep+0x18c/0x1b0\n ftrace_process_regex.isra.0+0x100/0x2d8\n ftrace_regex_release+0x484/0x618\n __fput+0x364/0xa58\n ____fput+0x28/0x40\n task_work_run+0x154/0x278\n do_notify_resume+0x1f0/0x220\n el0_svc+0xec/0xf0\n el0t_64_sync_handler+0xa0/0xe8\n el0t_64_sync+0x1ac/0x1b0\n\nThe reason is that trace_get_user will fail when processing a string\nlonger than FTRACE_BUFF_MAX, but not set the end of parser->buffer to 0.\nThen an OOB access will be triggered in ftrace_regex_release->\nftrace_process_regex->strsep->strpbrk. We can solve this problem by\nlimiting access to parser->buffer when trace_get_user failed.","state":0,"publishedAt":"2025-09-05T17:20:49.821+00:00","modifiedAt":"2026-10-15T22:02:30.066+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/trace.c\",\n \"kernel/trace/trace.h\"\n ],\n \"versions\": [\n {\n \"version\": \"634684d79733124f7470b226b0f42aada4426b07\",\n \"lessThan\": \"b842ef39c2ad6156c13afdec25ecc6792a9b67b9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8c9af478c06bb1ab1422f90d8ecbc53defd44bc3\",\n \"lessThan\": \"41b838420457802f21918df66764b6fbf829d330\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8c9af478c06bb1ab1422f90d8ecbc53defd44bc3\",\n \"lessThan\": \"418b448e1d7470da9d4d4797f71782595ee69c49\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8c9af478c06bb1ab1422f90d8ecbc53defd44bc3\",\n \"lessThan\": \"58ff8064cb4c7eddac4da1a59da039ead586950a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8c9af478c06bb1ab1422f90d8ecbc53defd44bc3\",\n \"lessThan\": \"d0c68045b8b0f3737ed7bd6b8c83b7887014adee\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8c9af478c06bb1ab1422f90d8ecbc53defd44bc3\",\n \"lessThan\": \"3079517a5ba80901fe828a06998da64b9b8749be\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8c9af478c06bb1ab1422f90d8ecbc53defd44bc3\",\n \"lessThan\": \"6a909ea83f226803ea0e718f6e88613df9234d58\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"24cd31752f47699b89b4b3471155c8e599a1a23a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"e9cb474de7ff7a970c2a3951c12ec7e3113c0c35\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"6ab671191f64b0da7d547e2ad4dc199ca7e5b558\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3d9281a4ac7171c808f9507f0937eb236b353905\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0b641b25870f02e2423e494365fc5243cc1e2759\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ffd51dbfd2900e50c71b5c069fe407957e52d61f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cdd107d7f18158d966c2bc136204fe826dac445c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.10.36\",\n \"lessThan\": \"5.10.241\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.4.269\",\n \"lessThan\": \"4.5\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.9.269\",\n \"lessThan\": \"4.10\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.14.233\",\n \"lessThan\": \"4.15\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.191\",\n \"lessThan\": \"4.20\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.118\",\n \"lessThan\": \"5.5\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.11.20\",\n \"lessThan\": \"5.12\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.12.3\",\n \"lessThan\": \"5.13\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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/trace.c\",\n \"kernel/trace/trace.h\"\n ],\n \"versions\": [\n {\n \"version\": \"5.13\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.13\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.241\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.190\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.149\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.103\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.44\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.16.4\",\n \"lessThanOrEqual\": \"6.16.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.17\",\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/b842ef39c2ad6156c13afdec25ecc6792a9b67b9","https://git.kernel.org/stable/c/41b838420457802f21918df66764b6fbf829d330","https://git.kernel.org/stable/c/418b448e1d7470da9d4d4797f71782595ee69c49","https://git.kernel.org/stable/c/58ff8064cb4c7eddac4da1a59da039ead586950a","https://git.kernel.org/stable/c/d0c68045b8b0f3737ed7bd6b8c83b7887014adee","https://git.kernel.org/stable/c/3079517a5ba80901fe828a06998da64b9b8749be","https://git.kernel.org/stable/c/6a909ea83f226803ea0e718f6e88613df9234d58"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-39683","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-39683","identifiers":["CVE-2025-39683"]},"retained":false,"historicalAffected":[]}],"coverage":[]}