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CVE-2026-9149— Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

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.

libsolv是openSUSE开源的一个用于检查软件包依赖的库。 libsolv存在安全漏洞，该漏洞源于repo_add_solv函数处理特制.solv文件时存在堆缓冲区溢出，可能导致拒绝服务。

CVSS 6.5 · Medium EPSS 0.31% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 9

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:0.7.33-5.el10_2< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:0.7.29-8.el10_0.1< * unaffected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat Hardened Images 0.7.38-2.hum1< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
Red Hat Red Hat Satellite 6 any affected
Red Hat Red Hat Update Infrastructure 4 for Cloud Providers any affected
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I. Basic Information for CVE-2026-9149

Vulnerability Information
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Vulnerability Title
Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libsolv. This heap buffer overflow vulnerability occurs when a victim processes a specially crafted `.solv` file containing negative size values in the `repo_add_solv` function. This leads to an undersized memory allocation and a subsequent out-of-bounds write. An attacker could exploit this to cause a denial of service (DoS).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
libsolv 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libsolv是openSUSE开源的一个用于检查软件包依赖的库。 libsolv存在安全漏洞，该漏洞源于repo_add_solv函数处理特制.solv文件时存在堆缓冲区溢出，可能导致拒绝服务。
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 0:0.7.33-5.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:0.7.29-8.el10_0.1 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Hardened Images 0.7.38-2.hum1 ~ * cpe:/a:redhat:hummingbird:1
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
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat Satellite 6 - cpe:/a:redhat:satellite:6
Red Hat Red Hat Update Infrastructure 4 for Cloud Providers - cpe:/a:redhat:rhui:4::el8

II. Public POCs for CVE-2026-9149

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III. Intelligence Information for CVE-2026-9149

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Patches & Fixes for CVE-2026-9149 (1)

Vendor Advisories for CVE-2026-9149 (4)

Other References for CVE-2026-9149 (1)

Same Patch Batch · Red Hat · 2026-05-20 · 3 CVEs total

CVE-2026-9150 6.5 MEDIUM Libsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha
CVE-2026-9087 6.4 MEDIUM Keycloak: cross-session email verification proof not bound to upstream identity in first-b

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-122

V. Comments for CVE-2026-9149

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