VulnerabilityPublished 28 Aug 2026Updated 21 Oct 2026

CVE-2026-80623: Linux kernel · coresight: ete: Always save state on power down

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f58d17798882a3aa3323f9d80fe85e25a38f4b93 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f58d17798882a3aa3323f9d80fe85e25a38f4b93, 31633ba13cc49017015f606d5c66eaf5052e99a8, 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 35e1c9163e025855f23a68f2470c471509e5d779, < f58d17798882a3aa3323f9d80fe85e25a38f4b93	Fixed in f58d17798882a3aa3323f9d80fe85e25a38f4b93
LinuxLinux	Affected ≥ 35e1c9163e025855f23a68f2470c471509e5d779, < 31633ba13cc49017015f606d5c66eaf5052e99a8	Fixed in 31633ba13cc49017015f606d5c66eaf5052e99a8
LinuxLinux	Affected ≥ 35e1c9163e025855f23a68f2470c471509e5d779, < 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319	Fixed in 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319
LinuxLinux	Affected ≥ 35e1c9163e025855f23a68f2470c471509e5d779, < 65d87f28daec31903fc39fee0744f7a0059c19f2	Fixed in 65d87f28daec31903fc39fee0744f7a0059c19f2
LinuxLinux	Affected ≥ 35e1c9163e025855f23a68f2470c471509e5d779, < 2ab4645fe4206c142a5f1491e191c906279686cf	Fixed in 2ab4645fe4206c142a5f1491e191c906279686cf
LinuxLinux	Affected =5.13	Fixed in–

Description

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

References

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