CVE-2026-23184

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> binder: fix UAF in binder_netlink_report()<br /> <br /> Oneway transactions sent to frozen targets via binder_proc_transaction()<br /> return a BR_TRANSACTION_PENDING_FROZEN error but they are still treated<br /> as successful since the target is expected to thaw at some point. It is<br /> then not safe to access &amp;#39;t&amp;#39; after BR_TRANSACTION_PENDING_FROZEN errors<br /> as the transaction could have been consumed by the now thawed target.<br /> <br /> This is the case for binder_netlink_report() which derreferences &amp;#39;t&amp;#39;<br /> after a pending frozen error, as pointed out by the following KASAN<br /> report:<br /> <br /> ==================================================================<br /> BUG: KASAN: slab-use-after-free in binder_netlink_report.isra.0+0x694/0x6c8<br /> Read of size 8 at addr ffff00000f98ba38 by task binder-util/522<br /> <br /> CPU: 4 UID: 0 PID: 522 Comm: binder-util Not tainted 6.19.0-rc6-00015-gc03e9c42ae8f #1 PREEMPT<br /> Hardware name: linux,dummy-virt (DT)<br /> Call trace:<br /> binder_netlink_report.isra.0+0x694/0x6c8<br /> binder_transaction+0x66e4/0x79b8<br /> binder_thread_write+0xab4/0x4440<br /> binder_ioctl+0x1fd4/0x2940<br /> [...]<br /> <br /> Allocated by task 522:<br /> __kmalloc_cache_noprof+0x17c/0x50c<br /> binder_transaction+0x584/0x79b8<br /> binder_thread_write+0xab4/0x4440<br /> binder_ioctl+0x1fd4/0x2940<br /> [...]<br /> <br /> Freed by task 488:<br /> kfree+0x1d0/0x420<br /> binder_free_transaction+0x150/0x234<br /> binder_thread_read+0x2d08/0x3ce4<br /> binder_ioctl+0x488/0x2940<br /> [...]<br /> ==================================================================<br /> <br /> Instead, make a transaction copy so the data can be safely accessed by<br /> binder_netlink_report() after a pending frozen error. While here, add a<br /> comment about not using t-&gt;buffer in binder_netlink_report().