CVE-2026-98311

Summary

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

wifi: virt_wifi: don't transfer operstate before register

virt_wifi_newlink() calls netif_stacked_transfer_operstate() before register_netdevice(). If the lower device is dormant, that queues the new netdev on lweventlist while it is still uninitialized. If registration fails after that, for example because of an invalid name such as "bad/name", free_netdev() immediately frees the object. A later linkwatch_fire_event() then use-after-frees the list entry.

Move the transfer to after netdev_upper_dev_link(), as macvlan and ipvlan already do.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < ee9ea1afd6990def51d52b3a0aecd5cfcc951da0affected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < 9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225affected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < f9526054c2b2cace5916b7225603d008834ec011affected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < e8304e25c6dabb8accf38b807969438d0ce84fd7affected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < ca49763c42c1089d654bf11b037980a9ede3772caffected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < 293c56a66510bb7de073a1aba388e38abddff1fbaffected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < b808a9af5fd21f9c68b0d024eda7535b5dce6a4eaffected
LinuxLinuxc7cdba31ed8b87526db978976392802d3f93110c < e5c8d7acd31b27057ea42cd405d0b3ece097bc89affected
LinuxLinux5.0affected
LinuxLinux0 < 5.0unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References