CVE-2026-4271— Libsoup: libsoup: denial of service via use-after-free in http/2 server
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I. Basic Information for CVE-2026-4271
Vulnerability Information
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Vulnerability Title
Libsoup: libsoup: denial of service via use-after-free in http/2 server
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw was found in libsoup, a library for handling HTTP requests. This vulnerability, known as a Use-After-Free, occurs in the HTTP/2 server implementation. A remote attacker can exploit this by sending specially crafted HTTP/2 requests that cause authentication failures. This can lead to the application attempting to access memory that has already been freed, potentially causing application instability or crashes, resulting in a Denial of Service (DoS).
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
libsoup 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libsoup是GNOME项目的一款GNOME的HTTP客户端/服务器库。 libsoup存在安全漏洞，该漏洞源于HTTP/2服务器实现中存在释放后重用漏洞，可能导致远程攻击者通过发送特制的HTTP/2请求导致身份验证失败，从而引发拒绝服务。
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-2026-4271
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|---|
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- 2448044 – (CVE-2026-4271) CVE-2026-4271 libsoup: libsoup: Denial of Service via Use-After-Free in HTTP/2 serverissue-trackingx_refsource_REDHAT
- https://nvd.nist.gov/vuln/detail/CVE-2026-4271
Same Patch Batch · Red Hat · 2026-03-17 · 5 CVEs total
| CVE-2026-4324 | 5.4 MEDIUM | Rubygem-katello: katello: denial of service and potential information disclosure via sql i |
| CVE-2026-3632 | 3.9 LOW | Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames |
| CVE-2026-3634 | 3.9 LOW | Libsoup: libsoup: http header injection and response splitting via crlf injection in conte |
| CVE-2026-3633 | 3.9 LOW | Libsoup: libsoup: header and http request injection via crlf injection |
IV. Related Vulnerabilities
Same product: Red Hat Enterprise Linux 10
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de - CVE-2026-34000
Xwayland: xorg: x.org x server: information disclosure and d
Same vendor: Red Hat
- CVE-2026-42011
Gnutls: gnutls: security bypass due to incorrect name constr - CVE-2026-42010
Gnutls: gnutls: authentication bypass via nul character in u - CVE-2026-6420
Keylime: keylime: security bypass due to hardcoded tpm quote - CVE-2026-34956
Openvswitch: open vswitch: denial of service via malformed f - CVE-2026-34002
Xorg: xwayland: x.org x server: information disclosure or de
V. Comments for CVE-2026-4271
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