CVE-2025-21728
bpf: Send signals asynchronously if !preemptible
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
27 Feb 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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()`.
Affected products
Linux · LinuxReferences
https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-265688.htmlhttps://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3fhttps://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12chttps://git.kernel.org/stable/c/feba1308bc5e8e04cee751d39fae8a9b407a9034https://lists.debian.org/debian-lts-announce/2025/03/msg00028.htmlhttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html