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CVE-2026-97963

UnknownEPSS 0.17%

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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.17%

6.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= b60189e0392fa06348911077ef281eb2b1047b6a, < ee33e424d4932c70f103b94a46b685923f236f65; >= b60189e0392fa06348911077ef281eb2b1047b6a, < 7ced87834f3a58761d4bbcabf8326478548e6a54; >= b60189e0392fa06348911077ef281eb2b1047b6a, < 79fb5bcc50996964e076dffbdc24b7d2c06bd957; >= 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. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
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.

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Source: NVD / NIST