CVE-2023-32248 Tree connection null pointer dereference denial-of-service vulnerability

What is CVE-2023-32248?

CVE-2023-32248 is a high-severity vulnerability in Linux kernel, published on 24 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the handling of SMB2_TREE_CONNECT and SMB2_QUERY_INFO commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

Weakness: CWE-476

Which versions are affected by CVE-2023-32248?

It affects 6 products.

Products include Linux kernel, Netapp H300s, Netapp H410c, Netapp H410s, Netapp H500s, Netapp H700s.

How do I fix CVE-2023-32248?

Apply the vendor's patch.

Is CVE-2023-32248 being exploited?

There is no known exploitation of CVE-2023-32248 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-27760, DEBIAN-CVE-2023-32248, GHSA-hm27-9g63-w87w, UBUNTU-CVE-2023-32248.