CVE-2026-97411

Summary

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

net: ibm: emac: mal: fix potential system hang in mal_remove()

napi_disable() is not idempotent and calling it on an already-disabled or unenabled NAPI context will cause the kernel to spin indefinitely waiting for the NAPI_STATE_SCHED bit to clear.

In mal_remove(), napi_disable() is called unconditionally. If no MACs were registered, NAPI was never enabled. Also, if they were registered but subsequently unregistered, NAPI was already disabled in mal_unregister_commac(). In either case, calling napi_disable() causes the kernel to hang upon module removal.

Fix this by only calling napi_disable() in mal_remove() if the commac list is not empty (which implies NAPI is enabled).

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < 9c1c814a662d9c81959eba591bb52b24639390f2affected
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < 34c4cae51718d6f393415e01c61314c1bde02f2eaffected
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < 62126e73e230cf4bd6c27cf201949c4290af84a1affected
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < f0399b3e212741bc5a64b8399d6266c4a150bdfeaffected
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < f6c1aad9b35fa083f48ce0c5926204891d82e089affected
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < c4cb9a728df66c46067b26263f5beb633aae4087affected
LinuxLinuxb3e441c6ed8655a42e7b4da1b6dc7939f259d9c9 < 7c5d41f87f079990bf241359e3c1332d8d10fe87affected
LinuxLinux2.6.24affected
LinuxLinux0 < 2.6.24unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References