CVE-2025-21728
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()`.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Linux kernel Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 5.6 | Affected | — |
| — | Affected | 5.4.291 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
AlmaLinux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | kernel-doc-5.14.0-611.5.1.el9_7.noarch.rpm |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.12.13-1 |
| sid | Fixed | 6.12.13-1 |
| forky | Fixed | 6.12.13-1 |
| bullseye | Fixed | 5.10.237-1 |
| bookworm | Fixed | 6.1.129-1 |
Red Hat Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
Rocky Linux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
References
- https://access.redhat.com/errata/RHSA-2025:20518
- https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260
- https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3f
- https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4
- https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240
- https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55
- https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4
- https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12c
- https://git.kernel.org/stable/c/feba1308bc5e8e04cee751d39fae8a9b407a9034
- 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
- https://www.suse.com/security/cve/CVE-2025-21728.html
- https://errata.rockylinux.org/RLSA-2025:20518
- https://security-tracker.debian.org/tracker/CVE-2025-21728
- https://bugzilla.redhat.com/2298169
- https://bugzilla.redhat.com/2312077
- https://bugzilla.redhat.com/2313092
- https://bugzilla.redhat.com/2320172
- https://bugzilla.redhat.com/2320259
- https://bugzilla.redhat.com/2320455
- https://bugzilla.redhat.com/2320616
- https://bugzilla.redhat.com/2320722
- https://bugzilla.redhat.com/2324549
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.