CVE-2026-54874— DTLS记录缓冲区过度内存使用漏洞
一分钟漏洞结论
影响对象
OpenSSL OpenSSL
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： --- 问题摘要： 在握手进行中接收属于未来时态（epoch）的 DTLS 记录，会导致 OpenSSL 缓存远大于该记录本身所需的内存。 影响摘要： 对端可以通过发送少量网络流量，使 OpenSSL DTLS 终端保留不成比例的大量内存，从而导致拒绝服务（DoS）。 CWE： CWE-405：不对称资源消耗（放大效应） 详细描述： 在 DTLS 握手过程中，对端可能已经合法地进入了下一个时态（例如，在本地终端处理完相同转换之前，它已发送了 ChangeCipherSpec 和
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-54874 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Excessive Memory Use Buffering DTLS Records for a Future Epoch
来源: CVE Program / CVE List V5
Vulnerability Description
Issue summary: Receiving a DTLS record for a future epoch while a handshake
is in progress causes OpenSSL to buffer far more memory than the record
itself requires.
Impact summary: A peer can use a small amount of network traffic to make an
OpenSSL DTLS endpoint retain a disproportionately large amount of memory,
which may lead to a Denial of Service.
CWE: CWE-405: Asymmetric Resource Consumption (Amplification)
Description: While a DTLS handshake is in progress, a peer may legitimately
have already moved on to the next epoch (for example, having sent its
ChangeCipherSpec and Finished messages) before the local endpoint has
processed the same transition, typically because of reordering on the
underlying UDP transport. OpenSSL buffers such early records so that they
can be processed once the local endpoint catches up.
Buffering a record currently retains the entire read buffer it arrived in,
which is sized to hold the largest possible DTLS record (around 16
kilobytes), rather than just the bytes that make up the record itself. Up
to 100 such records may be buffered per connection. As a result, a peer
that sends a stream of small forged records claiming to belong to the next
epoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of
memory, despite sending only a small fraction of that amount of data over
the network.
An attacker therefore gains a memory amplification factor of around 1200,
and can multiply the effect across as many associations as it is able to
open, making this a remote memory exhaustion Denial of Service risk for
DTLS servers. Since the memory retained per connection remains bounded,
and any limit an application already places on the number of concurrent
associations also bounds the total exposure, this issue has been assessed
as Low severity.
FIPS impact: no
No FIPS modules are affected by this issue as the affected code is outside
the OpenSSL FIPS module boundary.
OpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this
issue.
OpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.
OpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.
OpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.
OpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.
OpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.
Premium support customers only:
OpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi
OpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr
This issue was reported on 18 May 2026 by Amazon Web Services.
The fix has been developed by Matt Caswell.
-- cut (non-publishing metadata for internal use) --
Reported by: Amazon Web Services
Fixed by: Matt Caswell
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
不对称的资源消耗(放大攻击)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-54874 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-54874 的情报信息
请登录查看更多情报信息。
CVE-2026-54874 补丁与修复 (5)
CVE-2026-54874 厂商安全公告 (1)
同批安全公告 · OpenSSL · 2026-08-25 · 共 9 条
| CVE-2026-75803 | EVP_Cipher()使用AEAD时空密文伪造漏洞 | |
| CVE-2026-18798 | QUIC Server 处理初始包时可能触发双重释放漏洞 | |
| CVE-2026-63074 | ExtraCerts 无限缓存增长漏洞 | |
| CVE-2026-63072 | CMS 密钥解封装中的堆缓冲区溢出漏洞 | |
| CVE-2026-63073 | CMP响应验证中未信任的发送者DN被用作格式字符串漏洞 | |
| CVE-2026-63075 | QUIC ACK包保留可导致内存耗尽 | |
| CVE-2026-63076 | CMP Server 保护算法构造指针解引用漏洞 | |
| CVE-2026-14457 | RPK 服务器签名算法选择可导致引用缺失证书的漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-54874
暂无评论