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CVE-2026-80623

coresight: ete: Always save state on power down

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
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 35e1c9163e025855f23a68f2470c471509e5d779
Version < 65d87f28daec31903fc39fee0744f7a0059c19f2
Status affected
Version 35e1c9163e025855f23a68f2470c471509e5d779
Version < 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319
Status affected
Version 35e1c9163e025855f23a68f2470c471509e5d779
Version < 2ab4645fe4206c142a5f1491e191c906279686cf
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.13
Status affected
Version 0
Version < 5.13
Status unaffected
Version <= 6.18.*
Version 6.18.40
Status unaffected
Version <= 7.1.*
Version 7.1.5
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.061
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/65d87f28daec31903fc39fee0744f7a0059c19f2
https://git.kernel.org/stable/c/293dacd5b6a9f1275d92ca6c4fd874e54b2c8319
https://git.kernel.org/stable/c/2ab4645fe4206c142a5f1491e191c906279686cf