perf/ftrace: Fix WARNING in __unregister_ftrace_function
In the Linux kernel, the following vulnerability has been resolved: perf/ftrace: Fix WARNING in __unregister_ftrace_function perf_ftrace_function_unregister() unconditionally calls unregister_ftrace_function() without checking whether the ftrace_ops was ever successfully registered. This triggers a WARN_ON in __unregister_ftrace_function() when the ops doesn't have FTRACE_OPS_FL_ENABLED set. This can happen during perf_event_alloc() error cleanup when perf_trace_destroy() is called via __free_event() on an event whose ftrace_ops registration failed or was already torn down by perf_try_init_event()'s err_destroy path. The call path is: perf_event_alloc() error cleanup -> __free_event() -> event->destroy() [tp_perf_event_destroy] -> perf_trace_destroy() -> perf_trace_event_close() -> TRACE_REG_PERF_CLOSE -> perf_ftrace_function_unregister() -> unregister_ftrace_function() -> __unregister_ftrace_function() -> WARN_ON(!(ops->flags & FTRACE_OPS_FL_ENABLED)) Fix this by checking FTRACE_OPS_FL_ENABLED before attempting to unregister. If the ops is not enabled, just free the filter and return success.
CVE-2026-97443
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-97443
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7ef5aa081f989ecfecc1df02068a80aebbd3ec31",
"lessThan": "df097713b56ffac5eed32a9be2e7d27ac48d9087",
"versionType": "git"
},
{
"status": "affected",
"version": "c70ca298036c58a88686ff388d3d367e9d21acf0",
"lessThan": "7f845820afaad339341c2ae42bc7fdec175df9ea",
"versionType": "git"
},
{
"status": "affected",
"version": "c70ca298036c58a88686ff388d3d367e9d21acf0",
"lessThan": "9581123304b23049437324038698af9fb56ee663",
"versionType": "git"
},
{
"status": "affected",
"version": "315a50c6b1c6ce191f19f3372935d8e2ed9b53a6",
"versionType": "git"
},
{
"status": "affected",
"version": "1209b0b29fd472e7dbd2b06544b019dd9f9b7e51",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.24",
"lessThan": "6.12.111",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.13.12",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.14.3",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"kernel/trace/trace_event_perf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/trace/trace_event_perf.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-97443
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #2042 · Revision 1
- Added to Heist Feed
- Publisher date