CVE-2026-43157 octeontx2-af: CGX: fix bitmap leaks

What is CVE-2026-43157?

CVE-2026-43157 is a medium-severity memory corruption vulnerability in Linux kernel, published on 6 May 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:

octeontx2-af: CGX: fix bitmap leaks

The RX/TX flow-control bitmaps (rx_fc_pfvf_bmap and tx_fc_pfvf_bmap) are allocated by cgx_lmac_init() but never freed in cgx_lmac_exit(). Unbinding and rebinding the driver therefore triggers kmemleak:

unreferenced object (size 16): backtrace: rvu_alloc_bitmap cgx_probe

Free both bitmaps during teardown.

Weakness: CWE-401

Which versions are affected by CVE-2026-43157?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-43157?

Apply the vendor's patch.

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

Is CVE-2026-43157 being exploited?

There is no known exploitation of CVE-2026-43157 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-2026-43157, DEBIAN-CVE-2026-43157, GHSA-vgjg-qrh9-w8x6, ROOT-OS-UBUNTU-2404-CVE-2026-43157, UBUNTU-CVE-2026-43157.