CVE-2025-68724
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id Use check_add_overflow() to guard against potential integer overflows when adding the binary blob lengths and the size of an asymmetric_key_id structure and return ERR_PTR(-EOVERFLOW) accordingly. This prevents a possible buffer overflow when copying data from potentially malicious X.509 certificate fields that can be arbitrarily large, such as ASN.1 INTEGER serial numbers, issuer names, etc.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:21556
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-13578.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:13578
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-13577.html
Vendor advisory: alma — https://bugzilla.redhat.com/2460538
Vendor advisory: alma — https://bugzilla.redhat.com/2454844
Vendor advisory: alma — https://bugzilla.redhat.com/2453803
Vendor advisory: alma — https://bugzilla.redhat.com/2424886
Vendor advisory: alma — https://bugzilla.redhat.com/2301637
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:13577
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2025-68724
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2025-68724.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| rhel | 9 | fixed | |
| debian | bookworm | fixed | 6.1.162-1 |
| debian | bullseye | fixed | 5.10.249-1 |
| debian | forky | fixed | 6.17.13-1 |
| debian | sid | fixed | 6.17.13-1 |
| debian | trixie | fixed | 6.12.63-1 |
References
- https://www.suse.com/security/cve/CVE-2025-68724.html
- https://security-tracker.debian.org/tracker/CVE-2025-68724
- https://access.redhat.com/errata/RHSA-2026:13577
- https://bugzilla.redhat.com/2301637
- https://bugzilla.redhat.com/2424886
- https://bugzilla.redhat.com/2453803
- https://bugzilla.redhat.com/2454844
- https://bugzilla.redhat.com/2460538
- https://errata.almalinux.org/8/ALSA-2026-13577.html
- https://access.redhat.com/errata/RHSA-2026:13578
- https://errata.almalinux.org/8/ALSA-2026-13578.html
- https://access.redhat.com/errata/RHSA-2026:21556
Verify integrity in audit chain (admin only). AS-IS.