{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-54211", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54211", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-12-30T12:11:09.356Z", "updatedAt": "2026-05-11T19:57:37.075Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "tracing: Fix warning in trace_buffered_event_disable()", "summary": "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 'disable_event' command, then:\n # 1) SOFT_DISABLED_BIT was set;\n # 2) trace_buffered_event_enable() was called first time;\n echo 'cmdline_proc_show:disable_event:initcall:initcall_finish' > \\\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 > 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 'disable_event' command, then:\n # 1) SOFT_DISABLED_BIT was cleared again;\n # 2) trace_buffered_event_disable() was called second time!!!\n echo '!cmdline_proc_show:disable_event:initcall:initcall_finish' > \\\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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "1488d782c9e43087a3f341b8186cd25f3cf75583" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "b4f4ab423107dc1ba8e9cc6488c645be6403d3f5" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "cdcc35e6454133feb61561b4e0d0c80e52cbc2ba" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "a6d2fd1703cdc8ecfc3e73987e0fb7474ae2b074" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "813cede7b2f5a4b1b75d2d4bb4e705cc8e063b20" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "a3a3c7bddab9b6c5690b20796ef5e332b8c48afb" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "528c9d73153754defb748f0b96ad33308668d817" }, { "version": "0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9", "status": "affected", "versionType": "git", "lessThan": "dea499781a1150d285c62b26659f62fb00824fce" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "4.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "4.7" }, { "version": "4.14.322", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.291", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.253", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.190", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.124", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.43", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.4.8", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.4.*" }, { "version": "6.5", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }