CVE-2026-23368

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

net: phy: register phy led_triggers during probe to avoid AB-BA deadlock

There is an AB-BA deadlock when both LEDS_TRIGGER_NETDEV and

LED_TRIGGER_PHY are enabled:

[ 1362.049207] [<8054e4b8>] led_trigger_register+0x5c/0x1fc <-- Trying to get lock "triggers_list_lock" via down_write(&triggers_list_lock);

[ 1362.054536] [<80662830>] phy_led_triggers_register+0xd0/0x234

[ 1362.060329] [<8065e200>] phy_attach_direct+0x33c/0x40c

[ 1362.065489] [<80651fc4>] phylink_fwnode_phy_connect+0x15c/0x23c

[ 1362.071480] [<8066ee18>] mtk_open+0x7c/0xba0

[ 1362.075849] [<806d714c>] __dev_open+0x280/0x2b0

[ 1362.080384] [<806d7668>] __dev_change_flags+0x244/0x24c

[ 1362.085598] [<806d7698>] dev_change_flags+0x28/0x78

[ 1362.090528] [<807150e4>] dev_ioctl+0x4c0/0x654 <-- Hold lock "rtnl_mutex" by calling rtnl_lock();

[ 1362.094985] [<80694360>] sock_ioctl+0x2f4/0x4e0

[ 1362.099567] [<802e9c4c>] sys_ioct

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References