CVE-2026-72037

net: lan743x: Initialize eth_syslock spinlock before use

State: Published
Severity: Not scored
Published: Aug 15, 2026
Updated: Aug 17, 2026
Reserved: Aug 9, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	46b777ad9a8c269113634cee6a380bc4e53f3964 to before dfaefd9a7808736fcd2ed0de108f55c4badc15ccAffected 46b777ad9a8c269113634cee6a380bc4e53f3964 to before 6523daa6852b1bfef32ec7a105b0217e8a115687Affected 46b777ad9a8c269113634cee6a380bc4e53f3964 to before b6a93a42e0e61f0ba0005a942ee3bffb16c0574eAffected 46b777ad9a8c269113634cee6a380bc4e53f3964 to before 99a6f37b113c46815deb160c5012073563679ef4Affected 46b777ad9a8c269113634cee6a380bc4e53f3964 to before b99e890e6b32ffa11c145a16fefcf2c7137a9578Affected 46b777ad9a8c269113634cee6a380bc4e53f3964 to before 39139b1c1c2b614096519b526112c726adb12ff0Affected
LinuxLinux	6.0Affected before 6.0Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

46b777ad9a8c269113634cee6a380bc4e53f3964 to before dfaefd9a7808736fcd2ed0de108f55c4badc15ccAffected
46b777ad9a8c269113634cee6a380bc4e53f3964 to before 6523daa6852b1bfef32ec7a105b0217e8a115687Affected
46b777ad9a8c269113634cee6a380bc4e53f3964 to before b6a93a42e0e61f0ba0005a942ee3bffb16c0574eAffected
46b777ad9a8c269113634cee6a380bc4e53f3964 to before 99a6f37b113c46815deb160c5012073563679ef4Affected
46b777ad9a8c269113634cee6a380bc4e53f3964 to before b99e890e6b32ffa11c145a16fefcf2c7137a9578Affected
46b777ad9a8c269113634cee6a380bc4e53f3964 to before 39139b1c1c2b614096519b526112c726adb12ff0Affected

LinuxLinux

6.0Affected
before 6.0Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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