Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.4.33, < 5.4.291 |
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
FAQ
What is CVE-2025-21728?
CVE-2025-21728 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2025-21728?
CVE-2025-21728 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21728?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.