CVE-2023-53375
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
tracing: Free error logs of tracing instances
When a tracing instance is removed, the error messages that hold errors that occurred in the instance needs to be freed. The following reports a memory leak:
# cd /sys/kernel/tracing # mkdir instances/foo # echo 'hist:keys=x' > instances/foo/events/sched/sched_switch/trigger # cat instances/foo/error_log [ 117.404795] hist:sched:sched_switch: error: Couldn't find field Command: hist:keys=x ^ # rmdir instances/foo
Then check for memory leaks:
The problem is that the error log needs to be freed when the instance is removed.
Detalles técnicos trazas, registros y código del informe original
# echo scan > /sys/kernel/debug/kmemleak
# cat /sys/kernel/debug/kmemleak
unreferenced object 0xffff88810d8ec700 (size 192):
comm "bash", pid 869, jiffies 4294950577 (age 215.752s)
hex dump (first 32 bytes):
60 dd 68 61 81 88 ff ff 60 dd 68 61 81 88 ff ff `.ha....`.ha....
a0 30 8c 83 ff ff ff ff 26 00 0a 00 00 00 00 00 .0......&.......
backtrace:
[<00000000dae26536>] kmalloc_trace+0x2a/0xa0
[<00000000b2938940>] tracing_log_err+0x277/0x2e0
[<000000004a0e1b07>] parse_atom+0x966/0xb40
[<0000000023b24337>] parse_expr+0x5f3/0xdb0
[<00000000594ad074>] event_hist_trigger_parse+0x27f8/0x3560
[<00000000293a9645>] trigger_process_regex+0x135/0x1a0
[<000000005c22b4f2>] event_trigger_write+0x87/0xf0
[<000000002cadc509>] vfs_write+0x162/0x670
[<0000000059c3b9be>] ksys_write+0xca/0x170
[<00000000f1cddc00>] do_syscall_64+0x3e/0xc0
[<00000000868ac68c>] entry_SYSCALL_64_after_hwframe+0x72/0xdc
unreferenced object 0xffff888170c35a00 (size 32):
comm "bash", pid 869, jiffies 4294950577 (age 215.752s)
hex dump (first 32 bytes):
0a 20 20 43 6f 6d 6d 61 6e 64 3a 20 68 69 73 74 . Command: hist
3a 6b 65 79 73 3d 78 0a 00 00 00 00 00 00 00 00 :keys=x.........
backtrace:
[<000000006a747de5>] __kmalloc+0x4d/0x160
[<000000000039df5f>] tracing_log_err+0x29b/0x2e0
[<000000004a0e1b07>] parse_atom+0x966/0xb40
[<0000000023b24337>] parse_expr+0x5f3/0xdb0
[<00000000594ad074>] event_hist_trigger_parse+0x27f8/0x3560
[<00000000293a9645>] trigger_process_regex+0x135/0x1a0
[<000000005c22b4f2>] event_trigger_write+0x87/0xf0
[<000000002cadc509>] vfs_write+0x162/0x670
[<0000000059c3b9be>] ksys_write+0xca/0x170
[<00000000f1cddc00>] do_syscall_64+0x3e/0xc0
[<00000000868ac68c>] entry_SYSCALL_64_after_hwframe+0x72/0xdcCVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 4
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-401
- CWE-401
Referencias
- 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
- https://git.kernel.org/stable/c/c0cf0f55be043ef67c38f492aa37ed1986d2f6b6
JSON original (NVD)
Mostrar
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"value": "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."
}
],
"lastModified": "2026-06-17T06:45:08.577",
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