CVE-2026-98486
Published: October 21, 2026Last modified: November 3, 2026
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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.191-r0) |
| 25 LTS | linux-lts | Fixed (6.12.112-r0) | |
| Stream | linux-lts | Fixed (6.18.55-r0) |
References
- https://git.kernel.org/stable/c/0d31edc7ff1f7f265c11248819dfaf5a8274b209
- https://git.kernel.org/stable/c/30ff01b4c7e419bb70f40f01dcd7f6af680808b3
- https://git.kernel.org/stable/c/47785f9f638b064ce6e32e8e3b6f1ffd83849fc2
- https://git.kernel.org/stable/c/4b90112826439149dcee20e73d02f25ae0e2a9fb
- https://git.kernel.org/stable/c/7bd3e9a2d0c288e54f51df260d9433163f5fbc1e
- https://git.kernel.org/stable/c/9476b4468862927297c94c440863cd8ed1e7cc83
- https://git.kernel.org/stable/c/9de940a3c5731be5a544f6f366576cc4dc073f7c
- https://git.kernel.org/stable/c/a0f5fd7a285f44fa402242f26feddfe1d4a0fc6c