VulnerabilityPublished 23 Oct 2026

CVE-2026-98893: Linux kernel · firmware: arm_scmi: Validate SENSOR_UPDATE payload size

Source GCVE Database

Authoritative record:CVE-2026-98893· Medium

Not known to be exploited · fixed in e543d60f966a5f5c92298720c2fd1810f85a6be3 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e543d60f966a5f5c92298720c2fd1810f85a6be3, c148ff2f5a168e0bc41d801efca6ee35a376cfcb, 767789a58ae0d65ec3028e5b5b4da82210355d00 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 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.

ghsa-x3wq-mmx9-56pr

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ e3811190acf85c63518fbddaa28bcbfab2baa58d, < e543d60f966a5f5c92298720c2fd1810f85a6be3	Fixed in e543d60f966a5f5c92298720c2fd1810f85a6be3
LinuxLinux	Affected ≥ e3811190acf85c63518fbddaa28bcbfab2baa58d, < c148ff2f5a168e0bc41d801efca6ee35a376cfcb	Fixed in c148ff2f5a168e0bc41d801efca6ee35a376cfcb
LinuxLinux	Affected ≥ e3811190acf85c63518fbddaa28bcbfab2baa58d, < 767789a58ae0d65ec3028e5b5b4da82210355d00	Fixed in 767789a58ae0d65ec3028e5b5b4da82210355d00
LinuxLinux	Affected ≥ e3811190acf85c63518fbddaa28bcbfab2baa58d, < 87a72e75f7560ea45cd28870194eaa153dd19e75	Fixed in 87a72e75f7560ea45cd28870194eaa153dd19e75
LinuxLinux	Affected ≥ e3811190acf85c63518fbddaa28bcbfab2baa58d, < 32bc5496b48174dbca1f187f710955ee4d9527a1	Fixed in 32bc5496b48174dbca1f187f710955ee4d9527a1
LinuxLinux	Affected ≥ e3811190acf85c63518fbddaa28bcbfab2baa58d, < 1bbe431fc59704d012660647516f6f94ddd82564	Fixed in 1bbe431fc59704d012660647516f6f94ddd82564

AI-suggested

A fix has been applied to the Linux kernel to validate SENSOR_UPDATE payload sizes and reject truncated notifications. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's arm_scmi firmware component was resolved by adding validation for the SENSOR_UPDATE payload size. The issue involved the parser not verifying that the received payload contained the expected number of sensor readings before parsing, potentially leading to processing truncated update notifications. The fix rejects truncated notifications before reading the variable array.

References

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