CVE-2026-43447
HIGH EPSS 2.5%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
Description
In the Linux kernel, the following vulnerability has been resolved: iavf: fix PTP use-after-free during reset Commit 7c01dbfc8a1c5f ("iavf: periodically cache PHC time") introduced a worker to cache PHC time, but failed to stop it during reset or disable. This creates a race condition where `iavf_reset_task()` or `iavf_disable_vf()` free adapter resources (AQ) while the worker is still running. If the worker triggers `iavf_queue_ptp_cmd()` during teardown, it accesses freed memory/locks, leading to a crash. Fix this by calling `iavf_ptp_release()` before tearing down the adapter. This ensures `ptp_clock_unregister()` synchronously cancels the worker and cleans up the chardev before the backing resources are destroyed.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
2.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-416 Use After Free Memory Safety
Affected Products 5
References 3
- git.kernel.org https://git.kernel.org/stable/c/1b034f2429ce6b45ce74dc266175d277acafc5c4
- git.kernel.org https://git.kernel.org/stable/c/90cc8b2add29b57288025b51c70bc647e7cccb12
- git.kernel.org https://git.kernel.org/stable/c/efc54fb13d79117a825fef17364315a58682c7ec
Remediation
- git.kernel.org https://git.kernel.org/stable/c/1b034f2429ce6b45ce74dc266175d277acafc5c4
- git.kernel.org https://git.kernel.org/stable/c/90cc8b2add29b57288025b51c70bc647e7cccb12
- git.kernel.org https://git.kernel.org/stable/c/efc54fb13d79117a825fef17364315a58682c7ec