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CVE-2026-31431 PoC — crypto: algif_aead - Revert to operating out-of-place

Source
https://github.com/Threekiii/Awesome-POC/blob/master/%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F%E6%BC%8F%E6%B4%9E/Linux%20Copy%20Fail%20%E6%9C%AC%E5%9C%B0%E6%8F%90%E6%9D%83%E6%BC%8F%E6%B4%9E%20CVE-2026-31431.md
Associated Vulnerability
Title:crypto: algif_aead - Revert to operating out-of-place (CVE-2026-31431)
Description:In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.
File Snapshot

 # Linux Copy Fail 本地提权漏洞 CVE-2026-31431

## 漏洞描述

Linux kernel 是开源操作系统内核，2026 年 4 月，互联网上披露 CVE-2026-

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