CVE-2025-21728

MEDIUM

Linux Kernel - Denial of Service via BPF Signal Handling

Title source: llm
STIX 2.1

Description

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()`.

References (12)

Core 12
Core References

Scores

CVSS v3 5.5
EPSS 0.0018
EPSS Percentile 8.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (30)
linux/Kernel < 5.4.291linux
linux/Kernel 5.11.0 - 6.1.129linux
linux/Kernel 5.16.0 - 6.6.76linux
linux/Kernel 5.5.0 - 5.10.235linux
linux/Kernel 5.6.0 - 5.15.179linux
linux/Kernel 6.2.0 - 6.12.13linux
linux/Kernel 6.7.0 - 6.13.2linux
Linux/Linux < 5.6
Linux/Linux 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 - 092fc76b7ab4163e008f9cde596a58dad2108260
Linux/Linux 1bc7896e9ef44fd77858b3ef0b8a6840be3a4494 - 78b97783496b454435639937db3303e900a24d3f
... and 20 more
Published Feb 27, 2025
Tracked Since Feb 18, 2026