CVE-2025-21728

In the Linux kernel, the following vulnerability has been resolved: bpf: Send signals asynchronously if !preemptible BPF programs can execute in all kinds of contexts and when a program running in a non-preemptible context uses the bpf_send_signal() kfunc, it will cause issues because this kfunc can sleep. Change `irqs_disabled()` to `!preemptible()`.

CVSS 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)

Published

2025-02-27

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260
• https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3f
• https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4
• https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240
• https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55

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