In the Linux kernel, the following vulnerability has been resolved:
net: hip04: fix RX buffer leak on build_skb failure
When build_skb() fails in hip04_rx_poll(), the driver jumps to the refill path without releasing the current RX buffer and its DMA mapping. Installing a replacement buffer then overwrites the slot references and leaks both resources.
Keep the current slot intact and return budget so NAPI retries the same buffer. Also free a newly allocated RX fragment when dma_map_single() fails.
This issue was found by an in-house static analysis tool.
References
- https://git.kernel.org/stable/c/14fa65d10f5696b063a7d8d26e8291ea84a2c6ed
- https://git.kernel.org/stable/c/67a7614bde310da006ab259f4f163d3fb0f9e253
- https://git.kernel.org/stable/c/80d977f280b4eccd4ac5369871d0ecb2b9c9a49d
- https://git.kernel.org/stable/c/a0f247d63489a107bbc3b712a77b302af2a2a173
- https://git.kernel.org/stable/c/e054dcd990d8180cde529ea28ce0838e76a5ad5e