CVE-2026-43346: ice: ptp: don't WARN when controlling PF is unavailable
In the Linux kernel, the following vulnerability has been resolved:
ice: ptp: don't WARN when controlling PF is unavailable
In VFIO passthrough setups, it is possible to pass through only a PF which doesn't own the source timer. In that case the PTP controlling PF (adapter->ctrlpf) is never initialized in the VM, so icegetctrlptp() returns NULL and triggers WARNON() in iceptpsetuppf().
Since this is an expected behavior in that configuration, replace WARNON() with an informational message and return -EOPNOTSUPP.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-43346?
The severity of CVE-2026-43346 is categorized as low, as the vulnerability does not typically allow for exploitation.
How do I fix CVE-2026-43346?
To fix CVE-2026-43346, ensure that you have applied the latest updates for the Linux kernel that include the fix for the ice driver.
What software is affected by CVE-2026-43346?
CVE-2026-43346 affects the Linux kernel specifically related to the ice driver.
What is the impact of CVE-2026-43346?
The impact of CVE-2026-43346 involves unnecessary warning messages in VFIO passthrough setups, but it does not pose a significant security risk.
Is CVE-2026-43346 exploitative?
CVE-2026-43346 is not considered exploitative as it does not enable any unauthorized access or control.