CVE-2025-21728: vulnerability in Linux
bpf: Send signals asynchronously if !preemptible
Published · Updated
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
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 · LinuxRelated CVEs — Linux
In the same product, most dangerous first.
CVE-2024-53197HIGHALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devicesEPSS 4.1%KEVCVE-2026-31431HIGHcrypto: algif_aead - Revert to operating out-of-placeEPSS 3.4%KEVCVE-2024-53104HIGHmedia: uvcvideo: Skip parsing frames of type UVC_VS_UNDEFINED in uvc_parse_formatEPSS 3.4%KEVCVE-2025-39682CRITICALtls: fix handling of zero-length records on the rx_listEPSS 2.9%KEVCVE-2024-36971HIGHnet: fix __dst_negative_advice() raceEPSS 2.7%KEVCVE-2024-53150HIGHALSA: usb-audio: Fix out of bounds reads when finding clock sourcesEPSS 1.4%KEV
References
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