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()…
Does this matter?
Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.
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()`.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260Patch
- https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3fPatch
- https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4Patch
- https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240Patch
- https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55Patch
- https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4Patch
- https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12cPatch
- https://git.kernel.org/stable/c/feba1308bc5e8e04cee751d39fae8a9b407a9034Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.