GHSA-M579-RV75-WVGQ
Vulnerability from github – Published: 2025-12-30 15:30 – Updated: 2025-12-30 15:30In 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.
{
"affected": [],
"aliases": [
"CVE-2023-54211"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-30T13:16:09Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix warning in trace_buffered_event_disable()\n\nWarning happened in trace_buffered_event_disable() at\n WARN_ON_ONCE(!trace_buffered_event_ref)\n\n Call Trace:\n ? __warn+0xa5/0x1b0\n ? trace_buffered_event_disable+0x189/0x1b0\n __ftrace_event_enable_disable+0x19e/0x3e0\n free_probe_data+0x3b/0xa0\n unregister_ftrace_function_probe_func+0x6b8/0x800\n event_enable_func+0x2f0/0x3d0\n ftrace_process_regex.isra.0+0x12d/0x1b0\n ftrace_filter_write+0xe6/0x140\n vfs_write+0x1c9/0x6f0\n [...]\n\nThe cause of the warning is in __ftrace_event_enable_disable(),\ntrace_buffered_event_enable() was called once while\ntrace_buffered_event_disable() was called twice.\nReproduction script show as below, for analysis, see the comments:\n ```\n #!/bin/bash\n\n cd /sys/kernel/tracing/\n\n # 1. Register a \u0027disable_event\u0027 command, then:\n # 1) SOFT_DISABLED_BIT was set;\n # 2) trace_buffered_event_enable() was called first time;\n echo \u0027cmdline_proc_show:disable_event:initcall:initcall_finish\u0027 \u003e \\\n set_ftrace_filter\n\n # 2. Enable the event registered, then:\n # 1) SOFT_DISABLED_BIT was cleared;\n # 2) trace_buffered_event_disable() was called first time;\n echo 1 \u003e events/initcall/initcall_finish/enable\n\n # 3. Try to call into cmdline_proc_show(), then SOFT_DISABLED_BIT was\n # set again!!!\n cat /proc/cmdline\n\n # 4. Unregister the \u0027disable_event\u0027 command, then:\n # 1) SOFT_DISABLED_BIT was cleared again;\n # 2) trace_buffered_event_disable() was called second time!!!\n echo \u0027!cmdline_proc_show:disable_event:initcall:initcall_finish\u0027 \u003e \\\n set_ftrace_filter\n ```\n\nTo fix it, IIUC, we can change to call trace_buffered_event_enable() at\nfist time soft-mode enabled, and call trace_buffered_event_disable() at\nlast time soft-mode disabled.",
"id": "GHSA-m579-rv75-wvgq",
"modified": "2025-12-30T15:30:31Z",
"published": "2025-12-30T15:30:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54211"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1488d782c9e43087a3f341b8186cd25f3cf75583"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/528c9d73153754defb748f0b96ad33308668d817"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/813cede7b2f5a4b1b75d2d4bb4e705cc8e063b20"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a3a3c7bddab9b6c5690b20796ef5e332b8c48afb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a6d2fd1703cdc8ecfc3e73987e0fb7474ae2b074"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b4f4ab423107dc1ba8e9cc6488c645be6403d3f5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cdcc35e6454133feb61561b4e0d0c80e52cbc2ba"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dea499781a1150d285c62b26659f62fb00824fce"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
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