CVE-2021-47670
Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni(). Reordering the lines solves the issue.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2025-13590.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2025:13590
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2025-13589.html
Vendor advisory: alma — https://bugzilla.redhat.com/2376064
Vendor advisory: alma — https://bugzilla.redhat.com/2375304
Vendor advisory: alma — https://bugzilla.redhat.com/2360786
Vendor advisory: alma — https://bugzilla.redhat.com/2348596
Vendor advisory: alma — https://bugzilla.redhat.com/2348516
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2025:13589
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-47670
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-47670.html
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2025:13589
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2025:13590
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rocky | 8 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 5.10.12-1 |
| debian | bullseye | fixed | 5.10.12-1 |
| debian | forky | fixed | 5.10.12-1 |
| debian | sid | fixed | 5.10.12-1 |
| debian | trixie | fixed | 5.10.12-1 |
References
- https://errata.rockylinux.org/RLSA-2025:13590
- https://errata.rockylinux.org/RLSA-2025:13589
- https://www.suse.com/security/cve/CVE-2021-47670.html
- https://security-tracker.debian.org/tracker/CVE-2021-47670
- https://access.redhat.com/errata/RHSA-2025:13589
- https://bugzilla.redhat.com/2348516
- https://bugzilla.redhat.com/2348596
- https://bugzilla.redhat.com/2360786
- https://bugzilla.redhat.com/2375304
- https://bugzilla.redhat.com/2376064
- https://errata.almalinux.org/8/ALSA-2025-13589.html
- https://access.redhat.com/errata/RHSA-2025:13590
- https://errata.almalinux.org/8/ALSA-2025-13590.html
Verify integrity in audit chain (admin only). AS-IS.