Skip to content
Fencer Vulns
medium 6.5

CVE-2026-9149 json

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

published 2026-05-20 5 mo ago modified 2026-11-06 2 d ago also EUVD-2026-31201

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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).

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:0.7.33-5.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:0.7.29-8.el10_0.1
  • Red Hat Red Hat Hardened Images 0.7.38-2.hum1
  • libsolv Debian 14 0.7.38-1

debian advisories DEBIAN-CVE-2026-9149

  • libsolv RHEL 10.2 0.7.33-5.el10_2
  • python3-solv RHEL 10.2 0.7.33-5.el10_2
  • libsolv-tools RHEL 10.2 0.7.33-5.el10_2
  • libsolv-tools-base RHEL 10.2 0.7.33-5.el10_2
  • libsolv hummingbird 1 0.7.38-2.hum1
  • perl-solv hummingbird 1 0.7.38-2.hum1
  • ruby-solv hummingbird 1 0.7.38-2.hum1
  • libsolv-demo hummingbird 1 0.7.38-2.hum1

red hat advisories RHSA-2026:48818RHSA-2026:28236RHSA-2026:21333

  • zypper SLES 15 SP4-LTSS, SLE Micro 5.4, SLE Micro 5.3 +2 more 1.14.98-150400.3.104.1
  • libsolv SLES 15 SP4-LTSS, SLE Micro 5.4, SLE Micro 5.3 +3 more 0.7.39-150400.3.46.1
  • libzypp SLES 15 SP4-LTSS, SLE Micro 5.4, SLE Micro 5.3 +3 more 17.38.13-150400.3.158.1
  • libsolv SLES 15 SP6-LTSS, SLE Installer Updates 15 SP6 0.7.39-150600.8.24.1
  • libzypp SLES 15 SP6-LTSS, SLE Installer Updates 15 SP6 17.38.13-150600.3.92.1
  • zypper SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 1.14.98-150500.6.45.1
  • libsolv SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 0.7.39-150500.6.17.1
  • libzypp SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 17.38.13-150500.6.74.1

suse advisories SUSE-SU-2026:2674-1SUSE-SU-2026:2590-1SUSE-SU-2026:2575-1SUSE-SU-2026:2531-1SUSE-SU-2026:22172-1SUSE-SU-2026:22221-1

  • libsolv openSUSE Leap 16.0 0.7.39-160000.1.1
  • zypper openSUSE Leap 16.0 1.14.98-160000.1.1
  • libzypp openSUSE Leap 16.0 17.38.13-160000.1.1
  • libsolv openSUSE Tumbleweed 0.7.38-1.1

opensuse advisories openSUSE-SU-2026:21096-1openSUSE-SU-2026:10895-1

  • libsolv AlmaLinux 10 0.7.33-5.el10_2.alma.1
  • python3-solv AlmaLinux 10 0.7.33-5.el10_2.alma.1
  • libsolv-tools AlmaLinux 10 0.7.33-5.el10_2.alma.1
  • libsolv-tools-base AlmaLinux 10 0.7.33-5.el10_2.alma.1

almalinux advisories ALSA-2026:28236

  • libsolv Rocky Linux 10 0.7.33-5.el10_2

rocky linux advisories RLSA-2026:28236

  • libsolv Azure Linux 3.0 0.7.28-4

azure linux advisories AZL-88056

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-9149 updated cvss 6.5

libsolv: Heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file

  • Red Hat Enterprise Linux 7 libsolv, libsolv-demo, python2-solv, libsolv-tools Red Hat Enterprise Linux 8 libsolv, python3-solv, libsolv-tools Red Hat Enterprise Linux 9 libsolv, python3-solv, libsolv-tools Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat Satellite 6 libsolv, python2-solv, python3-solv Red Hat Update Infrastructure 4 for Cloud Providers libsolv
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-core-bff-rhel9, rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-automl-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-mlflow-rhel9, +6 more
    under investigation
  • Red Hat Enterprise Linux AppStream (v. 10) python3-solv 0.7.33-5.el10_2
    fixed: vendor fix RHSA-2026:28236
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) libsolv-debuginfo 0.7.29-8.el10_0.1, libsolv-debugsource 0.7.29-8.el10_0.1
    fixed: vendor fix RHSA-2026:48818
  • Red Hat Enterprise Linux BaseOS (v. 10) libsolv 0.7.33-5.el10_2
    fixed: vendor fix RHSA-2026:28236
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) libsolv 0.7.29-8.el10_0.1
    fixed: vendor fix RHSA-2026:48818
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libsolv-tools 0.7.33-5.el10_2, libsolv-tools-base 0.7.33-5.el10_2
    fixed: vendor fix RHSA-2026:28236
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libsolv-debuginfo 0.7.29-8.el10_0.1, libsolv-debugsource 0.7.29-8.el10_0.1
    fixed: vendor fix RHSA-2026:48818
show 2 more
  • Red Hat Hardened Images libsolv 0.7.38-2.hum1, perl-solv 0.7.38-2.hum1, ruby-solv 0.7.38-2.hum1, libsolv-demo 0.7.38-2.hum1, python3-solv 0.7.38-2.hum1, libsolv-tools 0.7.38-2.hum1, +1 more
    fixed: vendor fix RHSA-2026:21333
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) python3-solv 0.7.29-8.el10_0.1 Red Hat Enterprise Linux BaseOS EUS (v. 10.0) perl-solv-debuginfo 0.7.29-8.el10_0.1, ruby-solv-debuginfo 0.7.29-8.el10_0.1, libsolv-demo-debuginfo 0.7.29-8.el10_0.1, python3-solv-debuginfo 0.7.29-8.el10_0.1, libsolv-tools-debuginfo 0.7.29-8.el10_0.1, libsolv-tools-base-debuginfo 0.7.29-8.el10_0.1 Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libsolv-tools 0.7.29-8.el10_0.1, libsolv-tools-base 0.7.29-8.el10_0.1 Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9, rhoai/odh-kube-rbac-proxy-rhel9, rhoai/odh-maas-controller-rhel9, rhoai/odh-mlflow-operator-rhel9, rhoai/odh-model-controller-rhel9, rhoai/odh-ogx-k8s-operator-rhel9, +14 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/openSUSE/libsolv/pull/617 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Satellite 6
  • Red Hat Red Hat Update Infrastructure 4 for Cloud Providers

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.