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CVE-2026-98892VulnerabilityPublished Updated

Microsoft · firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98892· Medium

Not known to be exploited · fixed in cb77a50d1114c0c9e084176301a8e094d383edfa : update Microsoft when convenient.

Data as of 2 Nov 2026, 10:58 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in cb77a50d1114c0c9e084176301a8e094d383edfa, c0742f23ec13fb6f5e0cd884323467a6c127d3c2, bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 2 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 585dfab3fb80e67b3a54790b3d5ef2991feb3950, < cb77a50d1114c0c9e084176301a8e094d383edfa
Fixed in
  • cb77a50d1114c0c9e084176301a8e094d383edfa
LinuxLinuxAffected
  • ≥ 585dfab3fb80e67b3a54790b3d5ef2991feb3950, < c0742f23ec13fb6f5e0cd884323467a6c127d3c2
Fixed in
  • c0742f23ec13fb6f5e0cd884323467a6c127d3c2
LinuxLinuxAffected
  • ≥ 585dfab3fb80e67b3a54790b3d5ef2991feb3950, < bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216
Fixed in
  • bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216
LinuxLinuxAffected
  • ≥ 585dfab3fb80e67b3a54790b3d5ef2991feb3950, < 890a9c3bf9dae90dcabded9d8e10c708a13779f7
Fixed in
  • 890a9c3bf9dae90dcabded9d8e10c708a13779f7
LinuxLinuxAffected
  • ≥ 585dfab3fb80e67b3a54790b3d5ef2991feb3950, < 56e7e64cdd0e7209a58c8ec66028d63387402919
Fixed in
  • 56e7e64cdd0e7209a58c8ec66028d63387402919
LinuxLinuxAffected
  • ≥ 585dfab3fb80e67b3a54790b3d5ef2991feb3950, < 28d65a0a46435d48b96b6943c518095dff1602a1
Fixed in
  • 28d65a0a46435d48b96b6943c518095dff1602a1

Description

This vulnerability concerns the ARM SCMI firmware component, specifically related to validating the payload size of the BASE_ERROR_EVENT. The advisory references Microsoft's support lifecycle but provides no further technical details or impact description. The affected versions are 3.0 and 4.0. No CVSS score or exploit information is available.

References

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