CVE-2025-21728

low-risk
Published 2025-02-27

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()`.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Linux

References (10)

Patch https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260
Patch https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3f
Patch https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4
Patch https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240
Patch https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55
Patch https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4
Patch https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12c
Patch https://git.kernel.org/stable/c/feba1308bc5e8e04cee751d39fae8a9b407a9034
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low