CVE-2023-23005 Null dereference in n/a

What is CVE-2023-23005?

CVE-2023-23005 is a medium-severity vulnerability in Linux kernel, published on 1 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel before 6.2, mm/memory-tiers.c misinterprets the alloc_memory_type return value (expects it to be NULL in the error case, whereas it is actually an error pointer). NOTE: this is disputed by third parties because there are no realistic cases in which a user can cause the alloc_memory_type error case to be reached.

Weakness: CWE-476

Which versions are affected by CVE-2023-23005?

It affects 2 products.

Products include Linux kernel, Suse Linux Enterprise Server.

How do I fix CVE-2023-23005?

Apply the vendor's patch.

Is CVE-2023-23005 being exploited?

There is no known exploitation of CVE-2023-23005 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-25609, DEBIAN-CVE-2023-23005, GHSA-ghmc-655x-wwhc, ROOT-OS-DEBIAN-12-CVE-2023-23005, UBUNTU-CVE-2023-23005.