Answer in brief
CVE-2026-80623 records a Unknown severity vulnerability in coresight: ete: Always save state on power down. 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.
A CVSS score is not reported in the current record. 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 | >=35e1c9163e025855f23a68f2470c471509e5d779 <65d87f28daec31903fc39fee0744f7a0059c19f2 || >=35e1c9163e025855f23a68f2470c471509e5d779 <293dacd5b6a9f1275d92ca6c4fd874e54b2c8319 || >=35e1c9163e025855f23a68f2470c471509e5d779 <2ab4645fe4206c142a5f1491e191c906279686cf | 65d87f28daec31903fc39fee0744f7a0059c19f2, 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319, 2ab4645fe4206c142a5f1491e191c906279686cf |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 28, 2026
In the Linux kernel, the following vulnerability has been resolved: coresight: ete: Always save state on power down System register ETMs and ETE are unlikely to be preserved on CPU power down. The ETE DT binding also never documented "arm,coresight-loses-context-with-cpu" so nobody would have legitimately been able to use that binding to fix it and ACPI has no such binding at all. Fix it by hard coding the setting for sysreg ETMs (ETE is always sysreg) or ACPI boots. Use a local variable when setting up save_state so that it's immune to concurrent probing when devices have different configurations which is an issue with modifying the global. This fixes the following error when using Coresight with ACPI on the FVP which supports CPU PM: coresight ete0: External agent took claim tag WARNING: drivers/hwtracing/coresight/coresight-core.c:248 at coresight_disclaim_device_unlocked+0xe0/0xe8, CPU#0: perf/117
Quoted source text, attributed separately from HOL analysis.