What’s Vulnerable › Vulnerabilities

CVE-2024-46677: gtp: fix a potential NULL pointer dereference

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-13 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: gtp: fix a potential NULL pointer dereference When sockfd_lookup() fails, gtp_encap_enable_socket() returns a NULL pointer, but its callers only check for error pointers thus miss the NULL pointer case. Fix it by returning an error pointer with the error code carried from sockfd_lookup(). (I found this bug during code inspection.)

Affected products

• Linux kernel: from 4.12 before 4.19.321; from 4.20 before 5.4.283; from 5.5 before 5.10.225; from 5.11 before 5.15.166; from 5.16 before 6.1.108; from 6.2 before 6.6.49 — fixed in 4.19.321, 5.10.225, 5.15.166, 5.4.283, 6.1.108, 6.10.8

How to fix

Upgrade to a fixed version: Linux kernel 4.19.321, 5.10.225, 5.15.166, 5.4.283. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/28c67f0f84f889fe9f4cbda8354132b20dc9212d
• https://git.kernel.org/stable/c/4643b91691e969b1b9ad54bf552d7a990cfa3b87
• https://git.kernel.org/stable/c/612edd35f2a3910ab1f61c1f2338889d4ba99fa2
• https://git.kernel.org/stable/c/620fe9809752fae91b4190e897b81ed9976dfb39
• https://git.kernel.org/stable/c/8bbb9e4e0e66a39282e582d0440724055404b38c
• https://git.kernel.org/stable/c/bdd99e5f0ad5fa727b16f2101fe880aa2bff2f8e
• https://git.kernel.org/stable/c/defd8b3c37b0f9cb3e0f60f47d3d78d459d57fda
• https://git.kernel.org/stable/c/e8b9930b0eb045d19e883c65ff9676fc89320c70
• https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

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