Buffer overflow in openSUSE Libsolv
CVE-2026-9149
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).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003
Affected products
- openSUSE Libsolv
- Red Hat Enterprise Linux 10 — versions 0:0.7.33-5.el10_2
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:0.7.29-8.el10_0.1
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images — versions 0.7.38-2.hum1
- Red Hat Openshift Container Platform 4
- Red Hat Satellite 6
- Red Hat Update Infrastructure 4 For Cloud Providers
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-9149 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory, Issue Tracking)
- github.com/openSUSE/libsolv/pull/617 (Patch, Issue Tracking)
- access.redhat.com/errata/RHSA-2026:28236 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:21333 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:48818 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-9149?
- CVE-2026-9149 is a medium-severity vulnerability in openSUSE Libsolv, classified under Heap-based Buffer Overflow. CVSS score: 6.5/10. Published 2026-05-21.
- How severe is CVE-2026-9149?
- Medium severity. CVSS v3 base score is 6.5 out of 10.