CVE-2026-31736
Description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled If the gmac0 is disabled, the precheck for a valid ingress device will cause a NULL pointer deref and crash the system. This happens because eth->netdev[0] will be NULL but the code will directly try to access netdev_ops. Instead of just checking for the first net_device, it must be checked if any of the mtk_eth net_devices is matching the netdev_ops of the ingress device.
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
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.19.12-1 |
| debian | sid | fixed | 6.19.12-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 6.12.81 | |
| linux-kernel | 7.0 | affected | |
References
- https://git.kernel.org/stable/c/0b832aad33e6f160fda310f0306a6483d85e9d6e
- https://git.kernel.org/stable/c/5dff799c677152dde963c3917bacd9127b03e145
- https://git.kernel.org/stable/c/7b2380f0a0e374010c1a4a13203511b9dee5b166
- https://git.kernel.org/stable/c/976ff48c2ac6e6b25b01428c9d7997bcd0fb2949
- https://www.suse.com/security/cve/CVE-2026-31736.html
- https://security-tracker.debian.org/tracker/CVE-2026-31736
CWEs
CWE-476
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.