CVE-2024-44983 netfilter: flowtable: validate vlan header

What is CVE-2024-44983?

CVE-2024-44983 is a high-severity vulnerability in Linux kernel, published on 4 Sep 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

netfilter: flowtable: validate vlan header

Ensure there is sufficient room to access the protocol field of the VLAN header, validate it once before the flowtable lookup.

===================================================== BUG: KMSAN: uninit-value in nf_flow_offload_inet_hook+0x45a/0x5f0 net/netfilter/nf_flow_table_inet.c:32 nf_flow_offload_inet_hook+0x45a/0x5f0 net/netfilter/nf_flow_table_inet.c:32 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626 nf_hook_ingress include/linux/netfilter_netdev.h:34 [inline] nf_ingress net/core/dev.c:5440 [inline]

Weakness: CWE-908

Which versions are affected by CVE-2024-44983?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-44983?

Apply the vendor's patch.

Is CVE-2024-44983 being exploited?

There is no known exploitation of CVE-2024-44983 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-49003, AZL-49015, BELL-CVE-2024-44983, DEBIAN-CVE-2024-44983, GHSA-4gh9-53jc-3mcr, UBUNTU-CVE-2024-44983.