Answer in brief
CVE-2026-53241 records a Medium severity (CVSS 5.5) vulnerability in ALSA: seq: dummy: fix UMP event stack overread. 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 5.5. 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 | >=32cb23a0f911317cdb5030035e49a204aa86fef5 <a7ef78a2c536242ccb7a4429da01580b2409bb24 || >=32cb23a0f911317cdb5030035e49a204aa86fef5 <6671a46144f880c5a167930ebb14c12f3d059fe9 || >=32cb23a0f911317cdb5030035e49a204aa86fef5 <6676b6063440561db600494049ce7ffb695c8cc4 || >=32cb23a0f911317cdb5030035e49a204aa86fef5 <2b5ff4db5d7aa5b981d966df02e687f79ad7b311 | a7ef78a2c536242ccb7a4429da01580b2409bb24, 6671a46144f880c5a167930ebb14c12f3d059fe9, 6676b6063440561db600494049ce7ffb695c8cc4, 2b5ff4db5d7aa5b981d966df02e687f79ad7b311 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: dummy: fix UMP event stack overread The dummy sequencer port forwards events by copying an incoming struct snd_seq_event into a stack temporary, rewriting source and destination, and dispatching the temporary to subscribers. That legacy event storage is smaller than struct snd_seq_ump_event. When a UMP event reaches the dummy client, the copy leaves the UMP flag set but only provides legacy-sized stack storage. The subscriber delivery path then uses snd_seq_event_packet_size() and copies a UMP-sized packet from that stack object, reading past the end of the temporary. Use the existing union __snd_seq_event storage and copy the packet size reported for the incoming event before rewriting the common routing fields. This preserves the full UMP packet for UMP events while keeping legacy event handling unchanged.
Quoted source text, attributed separately from HOL analysis.