VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-90273: Linux kernel · coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in d5f3dae82705d9388434892915008da3bb83c4ba : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:42 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 d5f3dae82705d9388434892915008da3bb83c4ba, ba63c62d4252f6bc58fd2a567075c72d03332562, 26f9e89bad5a7e3005d3dc97a2e2fa6d6b2b8bb6 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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 ≥ 810ac401db1fe432020d7936a199591000de8279, < d5f3dae82705d9388434892915008da3bb83c4ba	Fixed in d5f3dae82705d9388434892915008da3bb83c4ba
LinuxLinux	Affected ≥ 810ac401db1fe432020d7936a199591000de8279, < ba63c62d4252f6bc58fd2a567075c72d03332562	Fixed in ba63c62d4252f6bc58fd2a567075c72d03332562
LinuxLinux	Affected ≥ 810ac401db1fe432020d7936a199591000de8279, < 26f9e89bad5a7e3005d3dc97a2e2fa6d6b2b8bb6	Fixed in 26f9e89bad5a7e3005d3dc97a2e2fa6d6b2b8bb6
LinuxLinux	Affected ≥ 810ac401db1fe432020d7936a199591000de8279, < 7e4f2702bbadbde887a5d8897297720a7f037ee5	Fixed in 7e4f2702bbadbde887a5d8897297720a7f037ee5
LinuxLinux	Affected ≥ 810ac401db1fe432020d7936a199591000de8279, < 0a47f0be6557b4a851addd430383a4dc7ee08752	Fixed in 0a47f0be6557b4a851addd430383a4dc7ee08752
LinuxLinux	Affected =5.15	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable In the perf enable path, there are missing cases where cscfg_csdev_disable_active_config() is not called: - Branch broadcast is selected but not supported by the hardware - etm4_enable_hw() fails This can lead to a leak of config_desc->active_cnt. Fix this by properly calling cscfg_csdev_disable_active_config() in these error paths.

References

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