BPF Signal Handling Issue in Linux Kernel
CVE-2025-21728
Currently unrated
What is CVE-2025-21728?
In the Linux kernel, a noteworthy vulnerability arose from the use of the bpf_send_signal() function within non-preemptible contexts. This function can cause issues as it may enter a sleep state, which is problematic in such execution contexts. The kernel has been updated to replace the irqs_disabled() condition with !preemptible(), addressing this potential disruption in signal handling for BPF programs.
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Affected Version(s)
Linux fd29a0242f86b2d95ad666aa9f92a3d0f7bfdab6
Linux 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494
Linux 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494