CVE-2023-2177 Null dereference in Linux

What is CVE-2023-2177?

CVE-2023-2177 is a medium-severity vulnerability in Linux kernel, published on 20 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A null pointer dereference issue was found in the sctp network protocol in net/sctp/stream_sched.c in Linux Kernel. If stream_in allocation is failed, stream_out is freed which would further be accessed. A local user could use this flaw to crash the system or potentially cause a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2023-2177?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-2177?

Apply the vendor's patch.

Is CVE-2023-2177 being exploited?

There is no known exploitation of CVE-2023-2177 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-26316, DEBIAN-CVE-2023-2177, GHSA-jh37-vq2p-5j5h, UBUNTU-CVE-2023-2177.