Answer in brief
CVE-2025-39994 records a High severity (CVSS 7.3) vulnerability in media: tuner: xc5000: Fix use-after-free in xc5000_release. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <bc4ffd962ce16a154c44c68853b9d93f5b6fc4b8 || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <e2f5eaafc0306a76fb1cb760aae804b065b8a341 || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <3f876cd47ed8bca1e28d68435845949f51f90703 || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <df0303b4839520b84d9367c2fad65b13650a4d42 || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <71ed8b81a4906cb785966910f39cf7f5ad60a69e || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <effb1c19583bca7022fa641a70766de45c6d41ac || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <9a00de20ed8ba90888479749b87bc1532cded4ce || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <4266f012806fc18e46da4a04d130df59a4946f93 || >=f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8 <40b7a19f321e65789612ebaca966472055dab48c | bc4ffd962ce16a154c44c68853b9d93f5b6fc4b8, e2f5eaafc0306a76fb1cb760aae804b065b8a341, 3f876cd47ed8bca1e28d68435845949f51f90703, df0303b4839520b84d9367c2fad65b13650a4d42, 71ed8b81a4906cb785966910f39cf7f5ad60a69e, effb1c19583bca7022fa641a70766de45c6d41ac, 9a00de20ed8ba90888479749b87bc1532cded4ce, 4266f012806fc18e46da4a04d130df59a4946f93, 40b7a19f321e65789612ebaca966472055dab48c |
| Linux/Linuxgeneric | 3.16 | Not reported |
Published upstream
Oct 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: media: tuner: xc5000: Fix use-after-free in xc5000_release The original code uses cancel_delayed_work() in xc5000_release(), which does not guarantee that the delayed work item timer_sleep has fully completed if it was already running. This leads to use-after-free scenarios where xc5000_release() may free the xc5000_priv while timer_sleep is still active and attempts to dereference the xc5000_priv. A typical race condition is illustrated below: CPU 0 (release thread) | CPU 1 (delayed work callback) xc5000_release() | xc5000_do_timer_sleep() cancel_delayed_work() | hybrid_tuner_release_state(priv) | kfree(priv) | | priv = container_of() // UAF Replace cancel_delayed_work() with cancel_delayed_work_sync() to ensure that the timer_sleep is properly canceled before the xc5000_priv memory is deallocated. A deadlock concern was considered: xc5000_release() is called in a process context and is not holding any locks that the timer_sleep work item might also need. Therefore, the use of the _sync() variant is safe here. This bug was initially identified through static analysis. [hverkuil: fix typo in Subject: tunner -> tuner]
Quoted source text, attributed separately from HOL analysis.