Deadlock The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-KERNELHEADERS-12012629
- published19 Aug 2025
- disclosed16 Aug 2025
Introduced: 16 Aug 2025
CVE-2025-38537 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
net: phy: Don't register LEDs for genphy
If a PHY has no driver, the genphy driver is probed/removed directly in phy_attach/detach. If the PHY's ofnode has an "leds" subnode, then the LEDs will be (un)registered when probing/removing the genphy driver. This could occur if the leds are for a non-generic driver that isn't loaded for whatever reason. Synchronously removing the PHY device in phy_detach leads to the following deadlock:
rtnl_lock() ndo_close() ... phy_detach() phy_remove() phy_leds_unregister() led_classdev_unregister() led_trigger_set() netdev_trigger_deactivate() unregister_netdevice_notifier() rtnl_lock()
There is a corresponding deadlock on the open/register side of things (and that one is reported by lockdep), but it requires a race while this one is deterministic.
Generic PHYs do not support LEDs anyway, so don't bother registering them.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2388920
- https://access.redhat.com/security/cve/CVE-2025-38537
- https://git.kernel.org/stable/c/75e1b2079ef0653a2f7aa69be515d86b7faf1908
- https://git.kernel.org/stable/c/ec158d05eaa91b2809cab65f8068290e3c05ebdd
- https://git.kernel.org/stable/c/f0f2b992d8185a0366be951685e08643aae17d6d
- https://git.kernel.org/stable/c/fd6493533af9e5d73d0d42ff2a8ded978a701dc6