CVE-2026-43197

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netconsole: avoid OOB reads, msg is not nul-terminated<br /> <br /> msg passed to netconsole from the console subsystem is not guaranteed<br /> to be nul-terminated. Before recent<br /> commit 7eab73b18630 ("netconsole: convert to NBCON console infrastructure")<br /> the message would be placed in printk_shared_pbufs, a static global<br /> buffer, so KASAN had harder time catching OOB accesses. Now we see:<br /> <br /> printk: console [netcon_ext0] enabled<br /> BUG: KASAN: slab-out-of-bounds in string+0x1f7/0x240<br /> Read of size 1 at addr ffff88813b6d4c00 by task pr/netcon_ext0/594<br /> <br /> CPU: 65 UID: 0 PID: 594 Comm: pr/netcon_ext0 Not tainted 6.19.0-11754-g4246fd6547c9<br /> Call Trace:<br /> kasan_report+0xe4/0x120<br /> string+0x1f7/0x240<br /> vsnprintf+0x655/0xba0<br /> scnprintf+0xba/0x120<br /> netconsole_write+0x3fe/0xa10<br /> nbcon_emit_next_record+0x46e/0x860<br /> nbcon_kthread_func+0x623/0x750<br /> <br /> Allocated by task 1:<br /> nbcon_alloc+0x1ea/0x450<br /> register_console+0x26b/0xe10<br /> init_netconsole+0xbb0/0xda0<br /> <br /> The buggy address belongs to the object at ffff88813b6d4000<br /> which belongs to the cache kmalloc-4k of size 4096<br /> The buggy address is located 0 bytes to the right of<br /> allocated 3072-byte region [ffff88813b6d4000, ffff88813b6d4c00)