CVE-2023-53669

In the Linux kernel, the following vulnerability has been resolved: tcp: fix skb_copy_ubufs() vs BIG TCP David Ahern reported crashes in skb_copy_ubufs() caused by TCP tx zerocopy using hugepages, and skb length bigger than ~68 KB. skb_copy_ubufs() assumed it could copy all payload using up to MAX_SKB_FRAGS order-0 pages. This assumption broke when BIG TCP was able to put up to 512 KB per skb. We did not hit this bug at Google because we use CONFIG_MAX_SKB_FRAGS=45 and limit gso_max_size to 180000. A solution is to use higher order pages if needed. v2: add missing __GFP_COMP, or we leak memory.

The following products are affected by CVE-2023-53669 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2023-53669.

URL	Resource
https://git.kernel.org/stable/c/3c77a377877acbaf03cd7caa21d3644a5dd16301
https://git.kernel.org/stable/c/7e692df3933628d974acb9f5b334d2b3e885e2a6
https://git.kernel.org/stable/c/7fa93e39fbb0566019c388a8038a4d58552e0910
https://git.kernel.org/stable/c/9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f
https://lore.kernel.org/linux-cve-announce/2025100705-CVE-2023-53669-f81f@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-53669
https://www.cve.org/CVERecord?id=CVE-2023-53669