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CVE-2026-9149

31
FAUCET Score

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).

First published: May 20, 2026Last modified: Jun 24, 2026

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.7.36CPE matchmatch criteria
cpe:2.3:a:opensuse:libsolv:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:a:redhat:satellite:6.0:*:*:*:*:*:*:*
4CPE matchmatch criteria
cpe:2.3:a:redhat:update_infrastructure:4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 22nd percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 21362-17084Fixed in: 0.7.28-4
microsoftpatch availablevia msrc
Product: azl3 libsolv 0.7.28-3 on Azure Linux 3.0Fixed in: 0.7.28-4
microsoftpatch availablevia msrc
Product: 21477-17084Fixed in: 0.7.28-4
microsoftpatch availablevia msrc
Product: azl3 libsolv 0.7.28-4 on Azure Linux 3.0Fixed in: 0.7.28-4

Vendor Advisories (1)

microsoft2026-May/CVE-2026-9149Moderate

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

May 12, 2026

References

access.redhat.com / errata/RHSA-2026:21333
access.redhat.com / errata/RHSA-2026:28236
access.redhat.com / security/cve/CVE-2026-9149
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / openSUSE/libsolv/pull/617
Issue TrackingPatch