CVE-2026-68126: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: mac802154: hold an interface reference across the scan worker mac802154_scan_worker() captures the scanning sub-interface under RCU and then keeps dereferencing sdata->dev after rcu_read_unlock() and outside the rtnl -- in the failure traces, in mac802154_transmit_beacon_req() (skb->dev = sdata->dev), and in the end_scan cleanup. Nothing keeps that netdev alive across the worker iteration. A concurrent DEL_INTERFACE or PHY removal can unregister the interface once the worker drops the rtnl between its two drv_set_channel() sections. unregister_netdevice() frees the netdev asynchronously from netdev_run_todo() with the rtnl already dropped, so neither holding the rtnl nor the per-PHY IEEE802154_IS_SCANNING flag prevents a stale worker iteration from dereferencing the freed netdev -- a KASAN slab-use-after-free, reachable by racing TRIGGER_SCAN against DEL_INTERFACE (both CAP_NET_ADMIN). Pin the netdev with netdev_hold() while the RCU read lock is still held, and release it at every worker exit.

Засегнати продукти

• Linux Linux: 57588c71177f0bfc08509c2c3a9bfe32850c0786 преди bd7110f0caa32426140ff302a209c53294ef2cfd; 57588c71177f0bfc08509c2c3a9bfe32850c0786 преди dd4754194a706163294b6141460101b99082c8c7; 57588c71177f0bfc08509c2c3a9bfe32850c0786 преди 59c1d5463b7bc5a2cdaae27108d1dfd67edc7d1b; 57588c71177f0bfc08509c2c3a9bfe32850c0786 преди 5f303f622f6bb8907c405e5123a0ab0f70fb0065; 57588c71177f0bfc08509c2c3a9bfe32850c0786 преди 234e5e898b713bc0b3a631b6f002897f43d046c8
• Linux Linux: 6.3; преди 6.3; 6.6.148 до 6.6.*; 6.12.101 до 6.12.*; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; 7.2 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-68126
• https://nvd.nist.gov/vuln/detail/CVE-2026-68126
• https://git.kernel.org/stable/c/bd7110f0caa32426140ff302a209c53294ef2cfd
• https://git.kernel.org/stable/c/dd4754194a706163294b6141460101b99082c8c7
• https://git.kernel.org/stable/c/59c1d5463b7bc5a2cdaae27108d1dfd67edc7d1b
• https://git.kernel.org/stable/c/5f303f622f6bb8907c405e5123a0ab0f70fb0065
• https://git.kernel.org/stable/c/234e5e898b713bc0b3a631b6f002897f43d046c8