# CVE-2023-53375: linux: In the Linux kernel, the following vulnerability has been resolved: tracing: Free error logs of tracing instances W... CVE-2023-53375 is fixed in 20 products on 1 platform, first by ALAS2023-2023-169, released April 27, 2023. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2023-53375 - Priority: Routine - CVSS: 5.5 (medium) - EPSS: 0.0016 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Apr 27, 2023 ## Description 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: # 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+0x72/0xdc The problem is that the error log needs to be freed when the instance is removed. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-debuginfo amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-devel amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-headers amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-libbpf amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-livepatch-6.1.25-37.47 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-tools amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | kernel-tools-devel amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | linux Debian 12.15 (bookworm) | 6.1.25-1 | [DEBIAN-CVE-2023-53375](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53375.md) | Sep 18, 2025 | | Linux | linux Debian 13.5 (trixie) | 6.1.25-1 | [DEBIAN-CVE-2023-53375](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53375.md) | Sep 18, 2025 | | Linux | linux Debian 14 | 6.1.25-1 | [DEBIAN-CVE-2023-53375](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53375.md) | Sep 18, 2025 | | Linux | perf amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | perf-debuginfo amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | python3-perf amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.25-37.47.amzn2023 | [ALAS2023-2023-169](https://patchblox.com/security/data/fix/linux/alas2023-2023-169.md) | Apr 27, 2023 | --- Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.