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Advisory severityHigh7.1Vendor: MediumRed Hat Linux

High [CVE-2026-64162] fix read_dev_clk_lock spinlock init in idpf_ptp_init

This high-severity Red Hat Linux advisory covers CVE-2026-64162 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Shadow Migration Toolkit for Virtualization for RHEL 10.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-64162 Source published Source updated

VulniPulse record published Record updated

CVE-2026-64162
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

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Summary

In the Linux kernel, the following vulnerability has been resolved: idpf: fix read_dev_clk_lock spinlock init in idpf_ptp_init() In idpf_ptp_init(), read_dev_clk_lock is initialized after ptp_schedule_worker() had already been called (and after idpf_ptp_settime64() could reach the lock).

Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Shadow Migration Toolkit for Virtualization for RHEL 10; Red Hat package: kernel.

Affected versions
  • < 12973.796587
  • < 00.0
  • < 12974.094507
  • < 12974.097208
  • < 12974.097213
  • < 12974.097218
  • < 12974.097234
  • < 12974.097249
  • < 12974.097259
  • < 12974.097272
  • < 12974.097281
  • < 12974.097311
  • < 12974.097318
  • < 12974.097330
  • < 12974.097343
  • < 12974.097353
  • < 12974.097373
  • < 12974.097391
  • < 12974.097404
  • < 12974.097411
  • < 12974.097428
  • < 12974.097436
  • < 12974.097454
  • < 12974.097464

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions
  • kernel-0:6.12.0-211.66.1.el10_2
  • kernel-0:5.14.0-687.56.1.el9_8
  • RHSA-2026:83207
  • RHSA-2026:77689

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • If the Intel Ethernet PTP functionality is not required, the `idpf` kernel module can be blacklisted to prevent it from loading. This can be achieved by creating a modprobe configuration file. 1. Create a file named `/etc/modprobe.d/blacklist-idpf.conf` with the following content: ``` blacklist idpf install idpf /bin/true ``` 2. Regenerate the initramfs to ensure the blacklist is applied during boot: - For systems using Dracut: `dracut -f -v` - For systems using mkinitcpio: `mkinitcpio -P` 3. Reboot the system for the changes to take effect. This mitigation may impact systems that rely on Intel Ethernet PTP for time synchronization.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

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