What’s Vulnerable › Vulnerabilities

CVE-2026-43346: ice: ptp: don't WARN when controlling PF is unavailable

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-08 · updated 2026-10-21
• Weakness: CWE-617

Description

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->ctrl_pf) is never initialized in the VM, so ice_get_ctrl_ptp() returns NULL and triggers WARN_ON() in ice_ptp_setup_pf(). Since this is an expected behavior in that configuration, replace WARN_ON() with an informational message and return -EOPNOTSUPP.

Affected products

• Linux kernel: from 6.12.11 before 6.13; from 6.13 before 6.18.24; from 6.19 before 6.19.14; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5, 7.0-rc6 (+1) — fixed in 6.13, 6.18.24, 6.19.14

How to fix

Upgrade to a fixed version: Linux kernel 6.13, 6.18.24, 6.19.14. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/228497715a162d040df1617e62c3b7d0df54b235
• https://git.kernel.org/stable/c/bb3f21edc7056cdf44a7f7bd7ba65af40741838c
• https://git.kernel.org/stable/c/c73f365707d3b1b78b7d16e1f029020d1ae50d0f
• https://git.kernel.org/stable/c/e19675b384e9dcaca1bd5e4a67b8ad136eccfbe8

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