CVE-2026-43157: octeontx2-af: CGX: fix bitmap leaks
In the Linux kernel, the following vulnerability has been resolved:
octeontx2-af: CGX: fix bitmap leaks
The RX/TX flow-control bitmaps (rxfcpfvfbmap and txfcpfvfbmap) are allocated by cgxlmacinit() but never freed in cgxlmacexit(). Unbinding and rebinding the driver therefore triggers kmemleak:
unreferenced object (size 16): backtrace: rvuallocbitmap cgxprobe
Free both bitmaps during teardown.
Affected Software
Remediation
Event History
Frequently Asked Questions
When does the memory leak occur?
The leak is triggered when the octeontx2-af CGX driver is unbound and then rebound. During initialization, RX/TX flow-control bitmaps are allocated, but the affected teardown path does not free them.
How can I determine whether this issue is present?
A system using the affected driver may report a kmemleak warning after an unbind/rebind cycle, identifying an unreferenced 16-byte object with a backtrace involving rvu_alloc_bitmap and cgx_probe.
What should be done to remediate the issue?
Apply an available Linux kernel patch that frees the RX and TX flow-control bitmaps during cgx_lmac_exit().