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Vulnerability · Published May 26, 2026 · Assigned by redhat

CVE-2026-48864Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data

High 7.8

In plain English

A high-severity out-of-bounds write in Cert Manager support for Red Hat OpenShift release 1.17 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 86.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in libsolv. This heap buffer overflow occurs during the decompression of attacker-controlled compressed data within `.solv` files due to insufficient input validation. An attacker can provide a specially crafted `.solv` file, which, when processed by a vulnerable application, can lead to out-of-bounds memory access. This could result in information disclosure, alteration of program execution, or a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10libsolv0.7.33-5.el10_2.alma.1ALSA-2026:28236
AlmaLinux:8libsolv0.7.20-7.el8_10ALSA-2026:36730
AlmaLinux:9libsolv0.7.24-6.el9_8ALSA-2026:39315
AlmaLinux:10libsolv-devel0.7.33-5.el10_2.alma.1ALSA-2026:28236
AlmaLinux:8libsolv-devel0.7.20-7.el8_10ALSA-2026:36730
AlmaLinux:9libsolv-devel0.7.24-6.el9_8ALSA-2026:39315
AlmaLinux:10libsolv-tools0.7.33-5.el10_2.alma.1ALSA-2026:28236
AlmaLinux:8libsolv-tools0.7.20-7.el8_10ALSA-2026:36730
AlmaLinux:9libsolv-tools0.7.24-6.el9_8ALSA-2026:39315
AlmaLinux:10libsolv-tools-base0.7.33-5.el10_2.alma.1ALSA-2026:28236
AlmaLinux:10python3-solv0.7.33-5.el10_2.alma.1ALSA-2026:28236
AlmaLinux:8python3-solv0.7.20-7.el8_10ALSA-2026:36730
AlmaLinux:9python3-solv0.7.24-6.el9_8ALSA-2026:39315
Debian:12libsolvno fix listedDEBIAN-CVE-2026-48864
Debian:13libsolvno fix listedDEBIAN-CVE-2026-48864
Debian:14libsolvno fix listedDEBIAN-CVE-2026-48864
Rocky Linux:10libsolv0:0.7.33-5.el10_2RLSA-2026:28236
Rocky Linux:8libsolv0:0.7.20-7.el8_10RLSA-2026:36730
Rocky Linux:9libsolv0:0.7.24-6.el9_8RLSA-2026:39315
Ubuntu:22.04:LTSlibsolvno fix listedUBUNTU-CVE-2026-48864
Ubuntu:24.04:LTSlibsolvno fix listedUBUNTU-CVE-2026-48864
Ubuntu:25.10libsolvno fix listedUBUNTU-CVE-2026-48864
Ubuntu:26.04:LTSlibsolvno fix listedUBUNTU-CVE-2026-48864
Ubuntu:26.10libsolvno fix listedUBUNTU-CVE-2026-48864

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat OpenShift Container Platform 4.12 see references
Red Hat Red Hat OpenShift Container Platform 4.13 see references
Red Hat Red Hat OpenShift Container Platform 4.14 see references
Red Hat Red Hat OpenShift Container Platform 4.15 see references
Red Hat Red Hat OpenShift Container Platform 4.16 see references
Red Hat Red Hat OpenShift Container Platform 4.17 see references
Red Hat Red Hat OpenShift Container Platform 4.18 see references
Red Hat Red Hat OpenShift Container Platform 4.19 see references
Red Hat Red Hat Satellite 6.16 for RHEL 8 see references
Red Hat Red Hat Satellite 6.16 for RHEL 8 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 see references

Weakness: CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References