Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621 The core and io supplies are only requested for ID_MT7530: both the devm_regulator_get() in probe and the regulator_enable() in mt7530_setup() are guarded by the switch id, but mt7530_remove() disables them unconditionally. On an MT7621 or an MT7531 both pointers are still NULL from devm_kzalloc(), so rmmod or a sysfs unbind calls regulator_disable() on NULL.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund18 Oct 2026WID-SEC-2026-4019

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-98866CVE-2026-98624CVE-2026-98745+326 more CVEs

[ References ]References

• git.kernel.org/stable/c/62c0e38b2e5034184d4502ce77bd178b29e59b83
• git.kernel.org/stable/c/aae2a1f1e3a0ac5eeb439262a2328a2a392413ac
• git.kernel.org/stable/c/bd172580e624bac00d83abd5c4320d2e14d853bc
• git.kernel.org/stable/c/c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4
• git.kernel.org/stable/c/e9a5298532780ecdd05c3220f3e1e3067b3537c3