CVE-2021-47596
Description
In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix use-after-free bug in hclgevf_send_mbx_msg Currently, the hns3_remove function firstly uninstall client instance, and then uninstall acceletion engine device. The netdevice is freed in client instance uninstall process, but acceletion engine device uninstall process still use it to trace runtime information. This causes a use after free problem. So fixes it by check the instance register state to avoid use after free.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 5.15.15-1 |
| debian | bullseye | fixed | 5.10.92-1 |
| debian | forky | fixed | 5.15.15-1 |
| debian | sid | fixed | 5.15.15-1 |
| debian | trixie | fixed | 5.15.15-1 |
| rocky | 9 | fixed | |
| almalinux | 9 | fixed | kernel-headers-5.14.0-427.26.1.el9_4.aarch64.rpm |
References
- https://access.redhat.com/errata/RHSA-2024:4583
- https://www.suse.com/security/cve/CVE-2021-47596.html
- https://security-tracker.debian.org/tracker/CVE-2021-47596
- https://errata.rockylinux.org/RLSA-2024:4583
- https://bugzilla.redhat.com/2267509
- https://bugzilla.redhat.com/2273082
- https://bugzilla.redhat.com/2273466
- https://bugzilla.redhat.com/2275735
- https://bugzilla.redhat.com/2277238
- https://bugzilla.redhat.com/2280434
- https://bugzilla.redhat.com/2281131
- https://bugzilla.redhat.com/2281925
- https://bugzilla.redhat.com/2283401
- https://bugzilla.redhat.com/2284541
- https://bugzilla.redhat.com/2284581
- https://bugzilla.redhat.com/2293230
- https://bugzilla.redhat.com/2293380
- https://bugzilla.redhat.com/2293402
- https://bugzilla.redhat.com/2293456
- https://bugzilla.redhat.com/2293653
- https://bugzilla.redhat.com/2294225
- https://errata.almalinux.org/9/ALSA-2024-4583.html
💬 Discuss CVE-2021-47596 on VIR Community →
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.