CVE-2026-23020 net: 3com: 3c59x: fix possible null dereference in vortex_probe1()

What is CVE-2026-23020?

CVE-2026-23020 is a medium-severity vulnerability in Linux kernel, published on 31 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

net: 3com: 3c59x: fix possible null dereference in vortex_probe1()

pdev can be null and free_ring: can be called in 1297 with a null pdev.

Weakness: CWE-476

Which versions are affected by CVE-2026-23020?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-23020?

Apply the vendor's patch.

Is CVE-2026-23020 being exploited?

There is no known exploitation of CVE-2026-23020 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 BELL-CVE-2026-23020, DEBIAN-CVE-2026-23020, GHSA-9g7x-62w8-h6g3, ROOT-OS-DEBIAN-11-CVE-2026-23020, ROOT-OS-DEBIAN-12-CVE-2026-23020, ROOT-OS-DEBIAN-13-CVE-2026-23020 and 3 more.