CVE-2026-72037

Summary

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

net: lan743x: Initialize eth_syslock spinlock before use

lan743x_hardware_init() calls pci11x1x_strap_get_status() during the PCI11x1x probe sequence. That helper acquires the Ethernet subsystem hardware lock via lan743x_hs_syslock_acquire(), which relies on adapter->eth_syslock_spinlock to serialize access.

The spinlock is currently initialized only after the strap status is read. With CONFIG_DEBUG_SPINLOCK enabled, taking the zeroed initialized spinlock can trip the spinlock debug check.

Fix by initializing adapter->eth_syslock_spinlock before reading the strap status so the probe path never attempts to lock an uninitialized spinlock.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux46b777ad9a8c269113634cee6a380bc4e53f3964 < dfaefd9a7808736fcd2ed0de108f55c4badc15ccaffected
LinuxLinux46b777ad9a8c269113634cee6a380bc4e53f3964 < 6523daa6852b1bfef32ec7a105b0217e8a115687affected
LinuxLinux46b777ad9a8c269113634cee6a380bc4e53f3964 < b6a93a42e0e61f0ba0005a942ee3bffb16c0574eaffected
LinuxLinux46b777ad9a8c269113634cee6a380bc4e53f3964 < 99a6f37b113c46815deb160c5012073563679ef4affected
LinuxLinux46b777ad9a8c269113634cee6a380bc4e53f3964 < b99e890e6b32ffa11c145a16fefcf2c7137a9578affected
LinuxLinux46b777ad9a8c269113634cee6a380bc4e53f3964 < 39139b1c1c2b614096519b526112c726adb12ff0affected
LinuxLinux6.0affected
LinuxLinux0 < 6.0unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References