CVE-2024-40921 net: bridge: mst: pass vlan group directly to br_mst_vlan_set_state

What is CVE-2024-40921?

CVE-2024-40921 is a medium-severity vulnerability in Linux kernel, published on 12 Jul 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:

net: bridge: mst: pass vlan group directly to br_mst_vlan_set_state

Pass the already obtained vlan group pointer to br_mst_vlan_set_state() instead of dereferencing it again. Each caller has already correctly dereferenced it for their context. This change is required for the following suspicious RCU dereference fix. No functional changes intended.

Which versions are affected by CVE-2024-40921?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-40921?

Apply the vendor's patch.

Is CVE-2024-40921 being exploited?

There is no known exploitation of CVE-2024-40921 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 BELL-CVE-2024-40921, DEBIAN-CVE-2024-40921, GHSA-whmg-cwg5-87xp, UBUNTU-CVE-2024-40921.