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In the Linux kernel, the following vulnerability has been resolved: net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit() The transmit loop in airoha_dev_xmit() reads fragment address and length during its final iteration, when the loop index equals skb_shinfo(skb)->nr_frags, at which point the fragment data is uninitialized. While these values are never consumed, the read itself is unsafe and may trigger a page fault. Fix this by avoiding the fragment read on the last iteration. Additionally, move the skb pointer from the first to the last used packet descriptor, so that airoha_qdma_tx_napi_poll() defers freeing the skb until the final descriptor is processed.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2026071932-CVE-2026-63857-2bda@gregkh/T
I really appreciate the in-depth analysis of CVE-2026-63857! Itβs crucial for us to tackle these uninitialized fragment address issues, especially given how they can impact overall system stability. I had a similar experience when diagnosing TCP issues in our network; it taught me the importance of thorough initialization. Thanks for shedding light on such an important topic! https://spacewavesgame.io