{"id":"CVE-2023-53375","summary":"tracing: Free error logs of tracing instances","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Free error logs of tracing instances\n\nWhen a tracing instance is removed, the error messages that hold errors\nthat occurred in the instance needs to be freed. The following reports a\nmemory leak:\n\n # cd /sys/kernel/tracing\n # mkdir instances/foo\n # echo 'hist:keys=x' \u003e instances/foo/events/sched/sched_switch/trigger\n # cat instances/foo/error_log\n [  117.404795] hist:sched:sched_switch: error: Couldn't find field\n   Command: hist:keys=x\n                      ^\n # rmdir instances/foo\n\nThen check for memory leaks:\n\n # echo scan \u003e /sys/kernel/debug/kmemleak\n # cat /sys/kernel/debug/kmemleak\nunreferenced object 0xffff88810d8ec700 (size 192):\n  comm \"bash\", pid 869, jiffies 4294950577 (age 215.752s)\n  hex dump (first 32 bytes):\n    60 dd 68 61 81 88 ff ff 60 dd 68 61 81 88 ff ff  `.ha....`.ha....\n    a0 30 8c 83 ff ff ff ff 26 00 0a 00 00 00 00 00  .0......&.......\n  backtrace:\n    [\u003c00000000dae26536\u003e] kmalloc_trace+0x2a/0xa0\n    [\u003c00000000b2938940\u003e] tracing_log_err+0x277/0x2e0\n    [\u003c000000004a0e1b07\u003e] parse_atom+0x966/0xb40\n    [\u003c0000000023b24337\u003e] parse_expr+0x5f3/0xdb0\n    [\u003c00000000594ad074\u003e] event_hist_trigger_parse+0x27f8/0x3560\n    [\u003c00000000293a9645\u003e] trigger_process_regex+0x135/0x1a0\n    [\u003c000000005c22b4f2\u003e] event_trigger_write+0x87/0xf0\n    [\u003c000000002cadc509\u003e] vfs_write+0x162/0x670\n    [\u003c0000000059c3b9be\u003e] ksys_write+0xca/0x170\n    [\u003c00000000f1cddc00\u003e] do_syscall_64+0x3e/0xc0\n    [\u003c00000000868ac68c\u003e] entry_SYSCALL_64_after_hwframe+0x72/0xdc\nunreferenced object 0xffff888170c35a00 (size 32):\n  comm \"bash\", pid 869, jiffies 4294950577 (age 215.752s)\n  hex dump (first 32 bytes):\n    0a 20 20 43 6f 6d 6d 61 6e 64 3a 20 68 69 73 74  .  Command: hist\n    3a 6b 65 79 73 3d 78 0a 00 00 00 00 00 00 00 00  :keys=x.........\n  backtrace:\n    [\u003c000000006a747de5\u003e] __kmalloc+0x4d/0x160\n    [\u003c000000000039df5f\u003e] tracing_log_err+0x29b/0x2e0\n    [\u003c000000004a0e1b07\u003e] parse_atom+0x966/0xb40\n    [\u003c0000000023b24337\u003e] parse_expr+0x5f3/0xdb0\n    [\u003c00000000594ad074\u003e] event_hist_trigger_parse+0x27f8/0x3560\n    [\u003c00000000293a9645\u003e] trigger_process_regex+0x135/0x1a0\n    [\u003c000000005c22b4f2\u003e] event_trigger_write+0x87/0xf0\n    [\u003c000000002cadc509\u003e] vfs_write+0x162/0x670\n    [\u003c0000000059c3b9be\u003e] ksys_write+0xca/0x170\n    [\u003c00000000f1cddc00\u003e] do_syscall_64+0x3e/0xc0\n    [\u003c00000000868ac68c\u003e] entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThe problem is that the error log needs to be freed when the instance is\nremoved.","modified":"2026-04-02T09:44:05.282895Z","published":"2025-09-18T13:33:21.664Z","related":["SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3761-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53375.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3357c6e429643231e60447b52ffbb7ac895aca22"},{"type":"WEB","url":"https://git.kernel.org/stable/c/33d5d4e67a0e13c3ca6257fa67bf6503bc000878"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46771c34d6721abfd9e7903eaed2201051eebec6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6e36373aa5ffa8e00fe7c71b3209f6f17081e552"},{"type":"WEB","url":"https://git.kernel.org/stable/c/987f599fc556a4e64c405d8dde32c70311e8c278"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0cf0f55be043ef67c38f492aa37ed1986d2f6b6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53375.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53375"},{"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":"2f754e771b1a6feba670782e82c45555984ac43b"},{"fixed":"987f599fc556a4e64c405d8dde32c70311e8c278"},{"fixed":"6e36373aa5ffa8e00fe7c71b3209f6f17081e552"},{"fixed":"33d5d4e67a0e13c3ca6257fa67bf6503bc000878"},{"fixed":"c0cf0f55be043ef67c38f492aa37ed1986d2f6b6"},{"fixed":"46771c34d6721abfd9e7903eaed2201051eebec6"},{"fixed":"3357c6e429643231e60447b52ffbb7ac895aca22"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53375.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}