CVE-2026-77680— Libsoup3 HTTP范围合并拒绝服务漏洞
一分钟漏洞结论
影响对象
Red Hat Red Hat Enterprise Linux 10
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
以下是对该漏洞描述信息的中文翻译： libsoup 的 HTTP Range 头处理中存在一个算法复杂度缺陷，该缺陷在 CVE-2025-32907 修复后依然存续。 CVE-2025-32907 解决了当客户端在单个 Range 头中重复指定同一范围多次时导致的内存放大问题。提交 修正了 中 的合并正确性问题，但合并循环仍对每个合并后的元素使用 来移除已合并的范围。由于 是连续内存结构，每次移除数组中间的元素都会执行 O(N) 复杂度的内存移动（memmove）。当提供大量相同的可满足范围（例如， 重复数千次）时
可能的 ATT&CK 技术 1 AI
T1496 · Resource Hijacking
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一、 漏洞 CVE-2026-77680 基础信息
漏洞信息
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Vulnerability Title
Libsoup3: libsoup: quadratic cpu denial of service in http range coalescing after cve-2025-32907 fix
来源: CVE Program / CVE List V5
Vulnerability Description
An algorithmic complexity flaw exists in libsoup's HTTP Range header processing that persists after the CVE-2025-32907 fix.
CVE-2025-32907 addressed memory amplification when a client repeated the same range many times in a single Range header. Commit 9bb92f7a corrected merge correctness in soup_message_headers_get_ranges_internal() in libsoup/soup-message-headers.c, but the coalescing loop still removes merged ranges using g_array_remove_index() for each coalesced element. Because GArray is contiguous, each mid-array removal performs an O(N) memmove. When many identical satisfiable ranges are supplied (for example bytes=0-0 repeated thousands of times), the loop performs O(N²) work coalescing them into a single range.
The vulnerable path is reachable server-side from handle_partial_get() in libsoup/server/http1/soup-server-message-io-http1.c when a SoupServer handler returns HTTP 200 with a non-empty body. No authentication is required. The number of ranges is bounded only by the maximum request header size (~100 KiB), allowing roughly 25,000 ranges per request. Reporter measurements on libsoup HEAD containing the CVE-2025-32907 fix show ~90 ms single-core CPU per such request at the wire maximum, blocking the server's event loop for that duration.
This is a CPU exhaustion / availability issue only. No memory corruption or information disclosure occurs.
Affected: libsoup versions containing the CVE-2025-32907 fix but not merge request !550.
Fixed upstream: MR !550 merged 2026-08-20, replacing per-element removal with O(N) in-place compaction and rejecting Range headers requesting more than 200 ranges.
Upstream report: https://gitlab.gnome.org/GNOME/libsoup/-/issues/538
Related: CVE-2025-32907
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
二、漏洞 CVE-2026-77680 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-77680 厂商安全公告 (2)
CVE-2026-77680 其他参考 (1)
同批安全公告 · Red Hat · 2026-08-25 · 共 10 条
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| CVE-2026-80186 | 7.6 HIGH | Bluez name2utf8栈溢出导致拒绝服务和潜在代码执行漏洞 |
| CVE-2026-78701 | 6.5 MEDIUM | 389-ds-base cve-2026-11610 连接停滞拒绝服务漏洞 |
| CVE-2026-78322 | 6.5 MEDIUM | File-roller 7z和RAR处理器栈缓冲区溢出漏洞 |
| CVE-2026-79717 | 6.4 MEDIUM | Galaxy_ng namespace avatar_url盲SSRF漏洞 |
| CVE-2026-79652 | 5.9 MEDIUM | Keycloak-services JWT授权未强制要求同意 |
| CVE-2026-80185 | 5.7 MEDIUM | Bluez 5.86 提权远程代码执行漏洞 |
| CVE-2026-80101 | 4.4 MEDIUM | GIMP XWD加载器多堆越界读取漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-77680
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