{"cve":"CVE-2023-53375","nvd":{"published":"2025-09-18T14:15:40.183","modified":"2026-06-17T06:45:08.577","status":"Modified","description":"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' > 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 > /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    [<00000000dae26536>] kmalloc_trace+0x2a/0xa0\n    [<00000000b2938940>] tracing_log_err+0x277/0x2e0\n    [<000000004a0e1b07>] parse_atom+0x966/0xb40\n    [<0000000023b24337>] parse_expr+0x5f3/0xdb0\n    [<00000000594ad074>] event_hist_trigger_parse+0x27f8/0x3560\n    [<00000000293a9645>] trigger_process_regex+0x135/0x1a0\n    [<000000005c22b4f2>] event_trigger_write+0x87/0xf0\n    [<000000002cadc509>] vfs_write+0x162/0x670\n    [<0000000059c3b9be>] ksys_write+0xca/0x170\n    [<00000000f1cddc00>] do_syscall_64+0x3e/0xc0\n    [<00000000868ac68c>] 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    [<000000006a747de5>] __kmalloc+0x4d/0x160\n    [<000000000039df5f>] tracing_log_err+0x29b/0x2e0\n    [<000000004a0e1b07>] parse_atom+0x966/0xb40\n    [<0000000023b24337>] parse_expr+0x5f3/0xdb0\n    [<00000000594ad074>] event_hist_trigger_parse+0x27f8/0x3560\n    [<00000000293a9645>] trigger_process_regex+0x135/0x1a0\n    [<000000005c22b4f2>] event_trigger_write+0x87/0xf0\n    [<000000002cadc509>] vfs_write+0x162/0x670\n    [<0000000059c3b9be>] ksys_write+0xca/0x170\n    [<00000000f1cddc00>] do_syscall_64+0x3e/0xc0\n    [<00000000868ac68c>] entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nThe problem is that the error log needs to be freed when the instance is\nremoved.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/3357c6e429643231e60447b52ffbb7ac895aca22","https://git.kernel.org/stable/c/33d5d4e67a0e13c3ca6257fa67bf6503bc000878","https://git.kernel.org/stable/c/46771c34d6721abfd9e7903eaed2201051eebec6","https://git.kernel.org/stable/c/6e36373aa5ffa8e00fe7c71b3209f6f17081e552","https://git.kernel.org/stable/c/987f599fc556a4e64c405d8dde32c70311e8c278"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:10:08.713834912+00:00"},"epss":{"cve":"CVE-2023-53375","score":0.0016,"percentile":0.05103,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}