CVE-2026-97963

net: stmmac: initialize ptp_lock at probe time

State: Published
Severity: Not scored
Published: Sep 25, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b60189e0392fa06348911077ef281eb2b1047b6a to before ee33e424d4932c70f103b94a46b685923f236f65Affected b60189e0392fa06348911077ef281eb2b1047b6a to before 7ced87834f3a58761d4bbcabf8326478548e6a54Affected b60189e0392fa06348911077ef281eb2b1047b6a to before 79fb5bcc50996964e076dffbdc24b7d2c06bd957Affected b60189e0392fa06348911077ef281eb2b1047b6a to before 420315413b29635de1d4ea4142e410e6465260f3Affected b60189e0392fa06348911077ef281eb2b1047b6a to before 25cc0096efba83b4e0e6fa50f03e9543b41e9d3dAffected b60189e0392fa06348911077ef281eb2b1047b6a to before b1986595cf827c38ff929e22fbc9ca8f76379306Affected b60189e0392fa06348911077ef281eb2b1047b6a to before 0338c68e22abd2ee509ec2e32508a50896618c32Affected
LinuxLinux	5.6Affected before 5.6Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.111 through 6.12.Not affected 6.18.53 through 6.18.Not affected 7.2.7 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

b60189e0392fa06348911077ef281eb2b1047b6a to before ee33e424d4932c70f103b94a46b685923f236f65Affected
b60189e0392fa06348911077ef281eb2b1047b6a to before 7ced87834f3a58761d4bbcabf8326478548e6a54Affected
b60189e0392fa06348911077ef281eb2b1047b6a to before 79fb5bcc50996964e076dffbdc24b7d2c06bd957Affected
b60189e0392fa06348911077ef281eb2b1047b6a to before 420315413b29635de1d4ea4142e410e6465260f3Affected
b60189e0392fa06348911077ef281eb2b1047b6a to before 25cc0096efba83b4e0e6fa50f03e9543b41e9d3dAffected
b60189e0392fa06348911077ef281eb2b1047b6a to before b1986595cf827c38ff929e22fbc9ca8f76379306Affected
b60189e0392fa06348911077ef281eb2b1047b6a to before 0338c68e22abd2ee509ec2e32508a50896618c32Affected

LinuxLinux

5.6Affected
before 5.6Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.111 through 6.12.*Not affected
6.18.53 through 6.18.*Not affected
7.2.7 through 7.2.*Not affected
7.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.