CVE-2024-50260 sock_map: fix a NULL pointer dereference in sock_map_link_update_prog()

What is CVE-2024-50260?

CVE-2024-50260 is a medium-severity vulnerability in Linux kernel, published on 9 Nov 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:

sock_map: fix a NULL pointer dereference in sock_map_link_update_prog()

The following race condition could trigger a NULL pointer dereference:

sock_map_link_detach(): sock_map_link_update_prog(): mutex_lock(&sockmap_mutex); ... sockmap_link->map = NULL; mutex_unlock(&sockmap_mutex); mutex_lock(&sockmap_mutex); ... sock_map_prog_link_lookup(sockmap_link->map); mutex_unlock(&sockmap_mutex); <continue>

Fix it by adding a NULL pointer check. In this specific case, it makes no sense to update a link which is being released.

Weakness: CWE-476

Which versions are affected by CVE-2024-50260?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50260?

Apply the vendor's patch.

Is CVE-2024-50260 being exploited?

There is no known exploitation of CVE-2024-50260 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-2024-50260, DEBIAN-CVE-2024-50260, GHSA-rhhp-94ch-9rf5, UBUNTU-CVE-2024-50260.