CVE-2023-54211: tracing: Fix warning in trace_buffered_event_disable()
Vulnerability summary
CVE-2023-54211 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.4% of scored vulnerabilities.
No CVSS vector published; no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 13Timeline
- 30-12-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix warning in trace_buffered_event_disable() Warning happened in trace_buffered_event_disable() at WARN_ON_ONCE(!trace_buffered_event_ref) Call Trace: ? __warn+0xa5/0x1b0 ? trace_buffered_event_disable+0x189/0x1b0 __ftrace_event_enable_disable+0x19e/0x3e0 free_probe_data+0x3b/0xa0 unregister_ftrace_function_probe_func+0x6b8/0x800 event_enable_func+0x2f0/0x3d0 ftrace_process_regex.isra.0+0x12d/0x1b0 ftrace_filter_write+0xe6/0x140 vfs_write+0x1c9/0x6f0 [...] The cause of the warning is in __ftrace_event_enable_disable(), trace_buffered_event_enable() was called once while trace_buffered_event_disable() was called twice. Reproduction script show as below, for analysis, see the comments: ``` #!/bin/bash cd /sys/kernel/tracing/ # 1. Register a 'disable_event' command, then: # 1) SOFT_DISABLED_BIT was set; # 2) trace_buffered_event_enable() was called first time; echo 'cmdline_proc_show:disable_event:initcall:initcall_finish' > \ set_ftrace_filter # 2. Enable the event registered, then: # 1) SOFT_DISABLED_BIT was cleared; # 2) trace_buffered_event_disable() was called first time; echo 1 > events/initcall/initcall_finish/enable # 3. Try to call into cmdline_proc_show(), then SOFT_DISABLED_BIT was # set again!!! cat /proc/cmdline # 4. Unregister the 'disable_event' command, then: # 1) SOFT_DISABLED_BIT was cleared again; # 2) trace_buffered_event_disable() was called second time!!! echo '!cmdline_proc_show:disable_event:initcall:initcall_finish' > \ set_ftrace_filter ``` To fix it, IIUC, we can change to call trace_buffered_event_enable() at fist time soft-mode enabled, and call trace_buffered_event_disable() at last time soft-mode disabled.
CVSS metrics
Risk metrics not yet published.
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.21% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: not stated in public data.
Ubuntu123 products
- linuxAll versions (No fix recorded) | < 5.4.0-169.187 | < 5.15.0-88.98
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.4.0-1116.126 | < 5.15.0-1049.54
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.52-1 | < 6.4.11-1
Linux1 product
- linux≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < 1488d782c9e43087a3f341b8186cd25f3cf75583 | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < b4f4ab423107dc1ba8e9cc6488c645be6403d3f5 | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < cdcc35e6454133feb61561b4e0d0c80e52cbc2ba | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < a6d2fd1703cdc8ecfc3e73987e0fb7474ae2b074 | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < 813cede7b2f5a4b1b75d2d4bb4e705cc8e063b20 | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < a3a3c7bddab9b6c5690b20796ef5e332b8c48afb | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < 528c9d73153754defb748f0b96ad33308668d817 | ≥ 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9, < dea499781a1150d285c62b26659f62fb00824fce | 4.7
3 vendors · 125 products
