CVE-2026-43010

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Reject sleepable kprobe_multi programs at attach time<br /> <br /> kprobe.multi programs run in atomic/RCU context and cannot sleep.<br /> However, bpf_kprobe_multi_link_attach() did not validate whether the<br /> program being attached had the sleepable flag set, allowing sleepable<br /> helpers such as bpf_copy_from_user() to be invoked from a non-sleepable<br /> context.<br /> <br /> This causes a "sleeping function called from invalid context" splat:<br /> <br /> BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:169<br /> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1787, name: sudo<br /> preempt_count: 1, expected: 0<br /> RCU nest depth: 2, expected: 0<br /> <br /> Fix this by rejecting sleepable programs early in<br /> bpf_kprobe_multi_link_attach(), before any further processing.