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地图 / Use-after-free in `mev_forget_socket` when `curl_easy_pause()` is called from a `CURL_POLL_REMOVE` socket callback (incomplete fix of CVE-2026-9080)

Use-after-free in `mev_forget_socket` when `curl_easy_pause()` is called from a `CURL_POLL_REMOVE` socket callback (incomplete fix of CVE-2026-9080)

内存破坏 / 释放后使用 / #3823985

厂商
curl
严重程度
低危
赏金
—
弱点
释放后使用
研究员
@stze
披露日期
2026-06-28
资产
https://github.com/curl/curl
CVE
CVE-2026-9080

该报告还没有中文解读。

原文摘录

摘自原文(7294 字符中的一小部分)
`libcurl`'s event interface lets the application's socket callback (`CURLMOPT_SOCKETFUNCTION`) call `curl_easy_pause()`. CVE-2026-9080 was issued for a use-after-free that this triggers, and the fix added a post-callback re-fetch of the socket-hash entry in the **UPDATE** leg …
原文中的代码
static CURLMcode mev_forget_socket(struct Curl_multi *multi,
                                   struct Curl_easy *data,
                                   curl_socket_t s, const char *cause)
{
  struct mev_sh_entry *entry = mev_sh_entry_get(&multi->ev.sh_entries, s);  // 202
  ... …

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时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @stze · 版权归作者与 curl 所有

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