{"id":"CVE-2025-37923","summary":"tracing: Fix oob write in trace_seq_to_buffer()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix oob write in trace_seq_to_buffer()\n\nsyzbot reported this bug:\n==================================================================\nBUG: KASAN: slab-out-of-bounds in trace_seq_to_buffer kernel/trace/trace.c:1830 [inline]\nBUG: KASAN: slab-out-of-bounds in tracing_splice_read_pipe+0x6be/0xdd0 kernel/trace/trace.c:6822\nWrite of size 4507 at addr ffff888032b6b000 by task syz.2.320/7260\n\nCPU: 1 UID: 0 PID: 7260 Comm: syz.2.320 Not tainted 6.15.0-rc1-syzkaller-00301-g3bde70a2c827 #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:408 [inline]\n print_report+0xc3/0x670 mm/kasan/report.c:521\n kasan_report+0xe0/0x110 mm/kasan/report.c:634\n check_region_inline mm/kasan/generic.c:183 [inline]\n kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189\n __asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106\n trace_seq_to_buffer kernel/trace/trace.c:1830 [inline]\n tracing_splice_read_pipe+0x6be/0xdd0 kernel/trace/trace.c:6822\n ....\n==================================================================\n\nIt has been reported that trace_seq_to_buffer() tries to copy more data\nthan PAGE_SIZE to buf. Therefore, to prevent this, we should use the\nsmaller of trace_seq_used(&iter-\u003eseq) and PAGE_SIZE as an argument.","modified":"2026-04-16T04:36:42.728615924Z","published":"2025-05-20T15:21:51.927Z","related":["SUSE-SU-2025:02249-1","SUSE-SU-2025:02254-1","SUSE-SU-2025:02307-1","SUSE-SU-2025:02333-1","SUSE-SU-2025:02334-1","SUSE-SU-2025:02335-1","SUSE-SU-2025:02538-1","SUSE-SU-2025:02923-1","SUSE-SU-2025:20475-1","SUSE-SU-2025:20483-1","SUSE-SU-2025:20493-1","SUSE-SU-2025:20498-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37923.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/056ebbddb8faf4ddf83d005454dd78fc25c2d897"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1a3f9482b50b74fa9421bff8ceecfefd0dc06f8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1f27a3e93b8d674b24b27fcdbc6f72743cd96c0d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/441021e5b3c7d9bd1b963590652c415929f3b157"},{"type":"WEB","url":"https://git.kernel.org/stable/c/665ce421041890571852422487f4c613d1824ba9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c5d2b66c5ef5037b4b4360e5447605ff00ba1bd4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f4b0174e9f18aaba59ee6ffdaf8827a7f94eb606"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f5178c41bb43444a6008150fe6094497135d07cb"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37923.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37923"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3c56819b14b00dd449bd776303e61f8532fad09f"},{"fixed":"f4b0174e9f18aaba59ee6ffdaf8827a7f94eb606"},{"fixed":"665ce421041890571852422487f4c613d1824ba9"},{"fixed":"1a3f9482b50b74fa9421bff8ceecfefd0dc06f8f"},{"fixed":"441021e5b3c7d9bd1b963590652c415929f3b157"},{"fixed":"056ebbddb8faf4ddf83d005454dd78fc25c2d897"},{"fixed":"1f27a3e93b8d674b24b27fcdbc6f72743cd96c0d"},{"fixed":"c5d2b66c5ef5037b4b4360e5447605ff00ba1bd4"},{"fixed":"f5178c41bb43444a6008150fe6094497135d07cb"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37923.json"}}],"schema_version":"1.7.5"}