Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1738cd3ed342294360d6a74d4e58800004bff854 before a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c; affected 1738cd3ed342294360d6a74d4e58800004bff854 before 7bd3e9a2d0c288e54f51df260d9433163f5fbc1e; affected 1738cd3ed342294360d6a74d4e58800004bff854 before 30ff01b4c7e419bb70f40f01dcd7f6af680808b3; affected 1738cd3ed342294360d6a74d4e58800004bff854 before 47785f9f638b064ce6e32e8e3b6f1ffd83849fc2; affected 1738cd3ed342294360d6a74d4e58800004bff854 before 9476b4468862927297c94c440863cd8ed1e7cc83 |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c
- https://git.kernel.org/stable/c/7bd3e9a2d0c288e54f51df260d9433163f5fbc1e
- https://git.kernel.org/stable/c/30ff01b4c7e419bb70f40f01dcd7f6af680808b3
- https://git.kernel.org/stable/c/47785f9f638b064ce6e32e8e3b6f1ffd83849fc2
- https://git.kernel.org/stable/c/9476b4468862927297c94c440863cd8ed1e7cc83