{"id":"CVE-2025-21728","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Send signals asynchronously if !preemptible\n\nBPF programs can execute in all kinds of contexts and when a program\nrunning in a non-preemptible context uses the bpf…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Send signals asynchronously if !preemptible\n\nBPF programs can execute in all kinds of contexts and when a program\nrunning in a non-preemptible context uses the bpf…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.4.33, < 5.4.291","linux_kernel >= 5.5.18, < 5.6","linux_kernel >= 5.6.1, < 5.10.235","linux_kernel >= 5.11, < 5.15.179","linux_kernel >= 5.16, < 6.1.129","linux_kernel >= 6.2, < 6.6.76","linux_kernel >= 6.7, < 6.12.13","linux_kernel >= 6.13, < 6.13.2","linux_kernel = 5.6"],"patched":["linux_kernel 6.13.2"],"published":"2025-02-27","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:17:31.037","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-21728","references":[{"url":"https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/feba1308bc5e8e04cee751d39fae8a9b407a9034","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00214,"epssPercentile":0.1169,"ingestedAt":"2026-10-15T03:30:12.789Z","slug":"CVE-2025-21728","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Send signals asynchronously if !preemptible\n\nBPF programs can execute in all kinds of contexts and when a program\nrunning in a non-preemptible context uses the bpf_send_signal() kfunc,\nit will cause issues because this kfunc can sleep.\nChange `irqs_disabled()` to `!preemptible()`.\n\n## Affected\n\n- `linux_kernel >= 5.4.33, < 5.4.291`\n- `linux_kernel >= 5.5.18, < 5.6`\n- `linux_kernel >= 5.6.1, < 5.10.235`\n- `linux_kernel >= 5.11, < 5.15.179`\n- `linux_kernel >= 5.16, < 6.1.129`\n- `linux_kernel >= 6.2, < 6.6.76`\n- `linux_kernel >= 6.7, < 6.12.13`\n- `linux_kernel >= 6.13, < 6.13.2`\n- `linux_kernel = 5.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.13.2`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}