Answer in brief
CVE-2026-68202 records a High severity (CVSS 7.8) vulnerability in ALSA: seq: close a re-opened queue timer in the destructor. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), 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 7.8. 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), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb40d03ed792a8a8bf77aa0ee15df57b0ff78b07 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24f0cabf173539f048946c8fc221131dc221f277 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a10025c7fd09a7d2af37a3ae1da188569fce470 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <31a6163e301d832060f8236f1ed17cbc1ca198df || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c4dc0ed50b05cd847a4b34b8cebf0775f19aeb9 | fb40d03ed792a8a8bf77aa0ee15df57b0ff78b07, 24f0cabf173539f048946c8fc221131dc221f277, 6a10025c7fd09a7d2af37a3ae1da188569fce470, 31a6163e301d832060f8236f1ed17cbc1ca198df, 2c4dc0ed50b05cd847a4b34b8cebf0775f19aeb9 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d9be6fc30f384f92c4e1b8ed40bd9d4796b7833 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb40d03ed792a8a8bf77aa0ee15df57b0ff78b07 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24f0cabf173539f048946c8fc221131dc221f277 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a10025c7fd09a7d2af37a3ae1da188569fce470 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <31a6163e301d832060f8236f1ed17cbc1ca198df || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c4dc0ed50b05cd847a4b34b8cebf0775f19aeb9 | 9d9be6fc30f384f92c4e1b8ed40bd9d4796b7833, fb40d03ed792a8a8bf77aa0ee15df57b0ff78b07, 24f0cabf173539f048946c8fc221131dc221f277, 6a10025c7fd09a7d2af37a3ae1da188569fce470, 31a6163e301d832060f8236f1ed17cbc1ca198df, 2c4dc0ed50b05cd847a4b34b8cebf0775f19aeb9 |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7feeaca1f53b10df9b4de9eaf611767ca70dc92 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7478ef94b49bc9789cf1a003deec58b42283dde4 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d9be6fc30f384f92c4e1b8ed40bd9d4796b7833 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb40d03ed792a8a8bf77aa0ee15df57b0ff78b07 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24f0cabf173539f048946c8fc221131dc221f277 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6a10025c7fd09a7d2af37a3ae1da188569fce470 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <31a6163e301d832060f8236f1ed17cbc1ca198df || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2c4dc0ed50b05cd847a4b34b8cebf0775f19aeb9 | b7feeaca1f53b10df9b4de9eaf611767ca70dc92, 7478ef94b49bc9789cf1a003deec58b42283dde4, 9d9be6fc30f384f92c4e1b8ed40bd9d4796b7833, fb40d03ed792a8a8bf77aa0ee15df57b0ff78b07, 24f0cabf173539f048946c8fc221131dc221f277, 6a10025c7fd09a7d2af37a3ae1da188569fce470, 31a6163e301d832060f8236f1ed17cbc1ca198df, 2c4dc0ed50b05cd847a4b34b8cebf0775f19aeb9 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: close a re-opened queue timer in the destructor queue_delete() closes the queue timer, then frees it. snd_seq_timer_close() clears q->timer->timeri. snd_use_lock_sync() then drains borrowers, and snd_seq_timer_delete() frees q->timer. A borrower can re-open the timer inside that window. A SET_QUEUE_CLIENT that took a queueptr() use_lock reference before the queue was unlinked runs snd_seq_timer_open() after the close. Open refuses re-open only while timeri is set, and the close just cleared it, so it re-opens timeri. snd_seq_timer_delete() does not close that instance. Its snd_seq_timer_stop() is a no-op, because running was cleared first. So it frees q->timer with the instance still live. The queue is freed next. The instance stays on the global timer with callback_data pointing at the freed queue. A non-owner START on the unlocked queue arms it. The next tick derefs the freed queue in snd_seq_timer_interrupt(). Reachable by an unprivileged user with access to /dev/snd/seq. No CAP and no queue ownership required. Close any lingering instance in the destructor. There, ->timeri can no longer change: the queue is unlinked and all use_lock borrowers have drained, so no snd_seq_queue_use() can re-open it. Close it before clearing q->timer. snd_timer_close() waits for any in-flight snd_seq_timer_interrupt() to finish, and that callback still reads q->timer (via snd_seq_check_queue()), so q->timer must stay valid until it drains.
Quoted source text, attributed separately from HOL analysis.