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CVE-2026-15713— Libsoup: soupcache: libsoup: http/2 frame window exhaustion remote denial of service via memory leak

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libsoup是libsoup团队开源的一个HTTP库。 libsoup存在资源管理错误漏洞，该漏洞源于libsoup的HTTP/2协议实现内存上下文块释放失败，可能导致远程未认证攻击者诱骗连接引擎分配流状态并在清理时泄漏，逐渐消耗系统堆分配，最终导致应用程序崩溃。

CVSS 5.9 · Medium EPSS 0.35% · P26

Affected Version Matrix 5

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any unknown
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-15713

Vulnerability Information
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Vulnerability Title
Libsoup: soupcache: libsoup: http/2 frame window exhaustion remote denial of service via memory leak
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated attacker acting as a malicious network peer can trick the connection engine into allocating stream states that are subsequently leaked during cleanup. Over a sustained period, this flaw allows the remote attacker to consume the system's heap allocations incrementally, triggering a denial of service (DoS) through an ultimate Out-of-Memory (OOM) application crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对已超过有效生命周期的资源丧失索引
Source: CVE Program / CVE List V5
Vulnerability Title
libsoup 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libsoup是libsoup团队开源的一个HTTP库。 libsoup存在资源管理错误漏洞，该漏洞源于libsoup的HTTP/2协议实现内存上下文块释放失败，可能导致远程未认证攻击者诱骗连接引擎分配流状态并在清理时泄漏，逐渐消耗系统堆分配，最终导致应用程序崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-15713

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III. Intelligence Information for CVE-2026-15713

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Vendor Advisories for CVE-2026-15713 (2)

Other References for CVE-2026-15713 (1)

Same Patch Batch · Red Hat · 2026-07-14 · 6 CVEs total

CVE-2026-15711 7.5 HIGH Libsoup: soupwebsocketconnection: libsoup: websocket remote denial of service via oversize
CVE-2026-15709 7.5 HIGH Soupwebsocketextensiondeflate: libsoup: libsoup: websocket permessage-deflate unbounded de
CVE-2026-15714 6.5 MEDIUM Libsoup: soupmultipartinputstream: libsoup: out-of-bounds read in soup_multipart_input_str
CVE-2026-15712 5.9 MEDIUM Soupclientmessageiohttp2: libsoup3: libsoup: http/2 goaway frame parsing heap buffer over-
CVE-2026-12478 4.8 MEDIUM Libsoup: incomplete fix for cve-2026-0716: out-of-bounds read in libsoup websocket frame p

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-772

V. Comments for CVE-2026-15713

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