What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-21 · updated 2026-09-01
• Weakness: CWE-122

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).

Affected products

• OpenSUSE libsolv: through 0.7.36
• Red Hat Enterprise Linux: 7.0, 8.0, 9.0, 10.0
• RedHat Hardened Images: all versions
• Red Hat OpenShift Container Platform 4.18: 4.0
• Red Hat Satellite 6: 6.0
• RedHat Update Infrastructure: 4

References

• https://access.redhat.com/errata/RHSA-2026:21333
• https://access.redhat.com/errata/RHSA-2026:28236
• https://access.redhat.com/errata/RHSA-2026:48818
• https://access.redhat.com/security/cve/CVE-2026-9149
• https://bugzilla.redhat.com/show_bug.cgi?id=2460380
• https://github.com/openSUSE/libsolv/pull/617
• https://github.com/openSUSE/libsolv/pull/617

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