CVE-2025-21812

CVE-2025-21812 concerns AX25 code in the Linux kernel. A lockdep/potential deadlock issue was observed around ax25_setsockopt() where a syzbot thread attempting to acquire rtnl_mutex could deadlock with a thread holding sk_lock-AF_AX25, due to an existing dependency chain involving ax25_setsockop...

Integer overflow

Integer signedness error in the ax25setsockopt function in net/ax25/afax25.c in the ax25 subsystem in the Linux kernel before 2.6.31.2 allows local users to cause a denial of service OOPS via a crafted optlen value in an SOBINDTODEVICE operation...