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CVE-2026-12548— Libsoup: heap out-of-bounds read in libsoup due to integer truncation

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.

GNOME libsoup是GNOME基金会开源的一款GNOME的HTTP客户端/服务器库。 GNOME libsoup存在缓冲区错误漏洞，该漏洞源于libsoup在解析多部分HTTP消息时，调用者与soup_headers_parse()之间的整数类型不匹配导致长度参数被错误截断，引发堆缓冲区过度读取，可能导致远程攻击者利用该漏洞使使用libsoup的应用程序崩溃或泄露堆内存内容。

CVSS 4.2 · Medium EPSS 0.25% · P15

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
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I. Basic Information for CVE-2026-12548

Vulnerability Information
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Vulnerability Title
Libsoup: heap out-of-bounds read in libsoup due to integer truncation
Source: CVE Program / CVE List V5
Vulnerability Description
A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soup_headers_parse() can cause the length parameter to be incorrectly truncated, leading to a heap buffer over-read. A remote attacker could use this flaw to crash an application using libsoup or potentially disclose heap memory contents.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
GNOME libsoup 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNOME libsoup是GNOME基金会开源的一款GNOME的HTTP客户端/服务器库。 GNOME libsoup存在缓冲区错误漏洞，该漏洞源于libsoup在解析多部分HTTP消息时，调用者与soup_headers_parse()之间的整数类型不匹配导致长度参数被错误截断，引发堆缓冲区过度读取，可能导致远程攻击者利用该漏洞使使用libsoup的应用程序崩溃或泄露堆内存内容。
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

II. Public POCs for CVE-2026-12548

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III. Intelligence Information for CVE-2026-12548

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Vendor Advisories for CVE-2026-12548 (1)

Other References for CVE-2026-12548 (1)

Same Patch Batch · Red Hat · 2026-07-21 · 20 CVEs total

CVE-2026-59851 8.8 HIGH Libssh: libssh: authentication bypass via missing gssapi principal check
CVE-2026-16493 7.8 HIGH Ansible-core: argument injection in ansible-galaxy collection install via git clone (incom
CVE-2026-16445 7.5 HIGH Dracut: dracut: root code execution via dhcp options command injection in networkmanager i
CVE-2026-15927 6.8 MEDIUM Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url vali
CVE-2026-15370 6.7 MEDIUM Libssh: libssh: stack buffer overflow in sftp server longname construction
CVE-2026-59843 6.5 MEDIUM Libssh: libssh: denial of service via zero advertised channel packet size
CVE-2026-16461 6.5 MEDIUM Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbdump() short-mode version-list form
CVE-2026-59844 6.5 MEDIUM Libssh: libssh: denial of service via oversized sftp read length
CVE-2026-59847 5.9 MEDIUM Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification
CVE-2026-15811 5.8 MEDIUM Kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration
CVE-2026-59845 5.3 MEDIUM Libssh: libssh: denial of service via unchecked proxycommand fork() failure
CVE-2026-59848 5.3 MEDIUM Libssh: libssh: denial of service via sftp responses with unknown request ids
CVE-2026-15812 4.8 MEDIUM Kronosnet: kronosnet: access control list bypass via link id spoofing on unencrypted dynam
CVE-2026-59850 4.3 MEDIUM Libssh: libssh: use-after-free via data callbacks on closed channels
CVE-2026-59846 3.9 LOW Libssh: libssh: information disclosure via proxycommand %r username expansion
CVE-2026-59842 3.7 LOW Libssh: libssh: information disclosure via short gssapi curve25519 public key
CVE-2026-12547 3.4 LOW Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on pr
CVE-2026-59849 3.1 LOW Libssh: libssh: denial of service via automatic certificate authentication loop
CVE-2026-16517 2.9 LOW Libarchive: libarchive: signed integer overflow in archive_write_zip_header

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-125

V. Comments for CVE-2026-12548

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