Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: net: ena: fix MMIO read buffer leak on probe failure ena_device_init() initializes the MMIO read mechanism with ena_com_mmio_reg_read_request_init(), which allocates a coherent DMA buffer for MMIO read responses. The normal removal path releases this buffer through ena_com_mmio_reg_read_request_destroy(). However, if ena_probe() fails after ena_device_init() succeeds, the error path destroys the admin resources and eventually frees ena_dev without destroying the MMIO read request, leaving the coherent DMA buffer allocated. Call ena_com_mmio_reg_read_request_destroy() in the probe error path before releasing the remaining device resources. This issue was found by manual code inspection.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• git.kernel.org/stable/c/30ff01b4c7e419bb70f40f01dcd7f6af680808b3
• git.kernel.org/stable/c/47785f9f638b064ce6e32e8e3b6f1ffd83849fc2
• git.kernel.org/stable/c/7bd3e9a2d0c288e54f51df260d9433163f5fbc1e
• git.kernel.org/stable/c/9476b4468862927297c94c440863cd8ed1e7cc83
• git.kernel.org/stable/c/a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c