CVE-2023-40791 Memory corruption in n/a

What is CVE-2023-40791?

CVE-2023-40791 is a medium-severity memory corruption vulnerability in Linux kernel, published on 16 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

extract_user_to_sg in lib/scatterlist.c in the Linux kernel before 6.4.12 fails to unpin pages in a certain situation, as demonstrated by a WARNING for try_grab_page.

Which versions are affected by CVE-2023-40791?

It affects 5 products.

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

How do I fix CVE-2023-40791?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-40791 being exploited?

There is no known exploitation of CVE-2023-40791 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-31564, DEBIAN-CVE-2023-40791, GHSA-fmxm-fv27-gg49, UBUNTU-CVE-2023-40791.