# CVE-2026-63977: linux: In the Linux kernel, the following vulnerability has been resolved:  dpll: zl3073x: use __dpll_device_change_ntf() an...

CVE-2026-63977 is fixed in linux on 1 platform by DEBIAN-CVE-2026-63977 (version 7.0.12-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-63977
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 19, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  dpll: zl3073x: use __dpll_device_change_ntf() and remove change_work  The change_work was introduced to send device change notifications from DPLL device callbacks without deadlocking on dpll_lock, since the callbacks are already invoked under that lock. Now that __dpll_device_change_ntf() is exported for callers that already hold dpll_lock, use it directly and remove the change_work infrastructure entirely.  This eliminates a race condition where change_work could be re-scheduled after cancel_work_sync() during device teardown, potentially causing the handler to dereference a freed or NULL dpll_dev pointer.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.12-1 | [DEBIAN-CVE-2026-63977](https://patchblox.com/security/data/fix/linux/debian-cve-2026-63977.md) | Jul 20, 2026 |

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Data as of 2026-11-10T20:03:11Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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