Strix
64.9K

CVE-2026-97963

Unknown

Last modified

CVE-2026-97963 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: net: stmmac: initialize ptp_lock at probe time priv->ptp_lock is only initialized in stmmac_ptp_register(), which runs during __stmmac_open(). However, the lock is also used while the interface is down and has never been opened: tc_taprio_configure() invokes the PTP gettime64() callback to compute the EST base time when offloading a TAPRIO schedule, and stmmac_get_time() takes priv->ptp_lock.

Description

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: initialize ptp_lock at probe time priv->ptp_lock is only initialized in stmmac_ptp_register(), which runs during __stmmac_open(). However, the lock is also used while the interface is down and has never been opened: tc_taprio_configure() invokes the PTP gettime64() callback to compute the EST base time when offloading a TAPRIO schedule, and stmmac_get_time() takes priv->ptp_lock. Using an uninitialized rwlock is undefined behaviour. Move the rwlock_init() to __stmmac_dvr_probe(), together with the other private locks, so that ptp_lock is always valid regardless of the interface state.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b60189e0392fa06348911077ef281eb2b1047b6a, < 420315413b29635de1d4ea4142e410e6465260f3; >= b60189e0392fa06348911077ef281eb2b1047b6a, < 25cc0096efba83b4e0e6fa50f03e9543b41e9d3d; >= b60189e0392fa06348911077ef281eb2b1047b6a, < b1986595cf827c38ff929e22fbc9ca8f76379306; >= b60189e0392fa06348911077ef281eb2b1047b6a, < 0338c68e22abd2ee509ec2e32508a50896618c32
LinuxLinux5.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-97963?
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: initialize ptp_lock at probe time priv->ptp_lock is only initialized in stmmac_ptp_register(), which runs during __stmmac_open(). However, the lock is also used while the interface is down and has never been opened: tc_taprio_configure() invokes the PTP gettime64() callback to compute the EST base time when offloading a TAPRIO schedule, and stmmac_get_time() takes priv->ptp_lock. Using an uninitialized rwlock is undefined behaviour. Move the rwlock_init() to __stmmac_dvr_probe(), together with the other private locks, so that ptp_lock is always valid regardless of the interface state.
How severe is CVE-2026-97963?
Severity scoring for CVE-2026-97963 is pending analysis.
How do I fix CVE-2026-97963?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-97963?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST