CVE-2026-97963
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.
How to fix
- Linux Linuxee33e424d4932c70f103b94a46b685923f236f65, 7ced87834f3a58761d4bbcabf8326478548e6a54, 79fb5bcc50996964e076dffbdc24b7d2c06bd957, 420315413b29635de1d4ea4142e410e6465260f3, 25cc0096efba83b4e0e6fa50f03e9543b41e9d3d, b1986595cf827c38ff929e22fbc9ca8f76379306, 0338c68e22abd2ee509ec2e32508a50896618c32 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < ee33e424d4932c70f103b94a46b685923f236f65, b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < 7ced87834f3a58761d4bbcabf8326478548e6a54, b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < 79fb5bcc50996964e076dffbdc24b7d2c06bd957, b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < 420315413b29635de1d4ea4142e410e6465260f3, b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < 25cc0096efba83b4e0e6fa50f03e9543b41e9d3d, b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < b1986595cf827c38ff929e22fbc9ca8f76379306, b60189e0392fa06348911077ef281eb2b1047b6a ≤ v < 0338c68e22abd2ee509ec2e32508a50896618c32, 5.6 | ee33e424d4932c70f103b94a46b685923f236f65, 7ced87834f3a58761d4bbcabf8326478548e6a54, 79fb5bcc50996964e076dffbdc24b7d2c06bd957, 420315413b29635de1d4ea4142e410e6465260f3, 25cc0096efba83b4e0e6fa50f03e9543b41e9d3d, b1986595cf827c38ff929e22fbc9ca8f76379306, 0338c68e22abd2ee509ec2e32508a50896618c32 |
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