CVE-2025-21728
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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()`.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260 ↗
Additional information
- NVD record
- 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