CVE-2024-49997 net: ethernet: lantiq_etop: fix memory disclosure

What is CVE-2024-49997?

CVE-2024-49997 is a high-severity vulnerability in Linux kernel, published on 21 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: lantiq_etop: fix memory disclosure

When applying padding, the buffer is not zeroed, which results in memory disclosure. The mentioned data is observed on the wire. This patch uses skb_put_padto() to pad Ethernet frames properly. The mentioned function zeroes the expanded buffer.

In case the packet cannot be padded it is silently dropped. Statistics are also not incremented. This driver does not support statistics in the old 32-bit format or the new 64-bit format. These will be added in the future. In its current form, the patch should be easily backported to stable versions.

Ethernet MACs on Amazon-SE and Danube cannot do padding of the packets in hardware, so software padding must be applied.

Weakness: CWE-212

Which versions are affected by CVE-2024-49997?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-49997?

Apply the vendor's patch.

Is CVE-2024-49997 being exploited?

There is no known exploitation of CVE-2024-49997 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-51834, BELL-CVE-2024-49997, DEBIAN-CVE-2024-49997, GHSA-9xrj-2966-hg7q, ROOT-OS-DEBIAN-11-CVE-2024-49997, UBUNTU-CVE-2024-49997.