CVE-2026-80623coresight: ete: Always save state on power down
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 35e1c9163e025855f23a68f2470c471509e5d779 before 65d87f28daec31903fc39fee0744f7a0059c19f2; from 35e1c9163e025855f23a68f2470c471509e5d779 before 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319; 35e1c9163e025855f23a68f2470c471509e5d779 builds before 2ab4645fe4206c142a5f1491e191c906279686cf | CNA record |
References
- https://git.kernel.org/stable/c/65d87f28daec31903fc39fee0744f7a0059c19f2
- https://git.kernel.org/stable/c/293dacd5b6a9f1275d92ca6c4fd874e54b2c8319
- https://git.kernel.org/stable/c/2ab4645fe4206c142a5f1491e191c906279686cf
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.