Libsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha384/sha512 checksums
Published May 20, 2026
6.5
MEDIUMCVSS 3.1
EPSS 0.58%
Description
A flaw was found in libsolv. This stack-based buffer overflow vulnerability occurs in libsolv's Debian metadata parser when processing specially crafted Debian repository metadata. An attacker could exploit this by providing malicious SHA384 or SHA512 checksum tags, leading to memory corruption and a denial of service (DoS) in the affected system.
Affected products
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 | affected |
| |||
| Red Hat | Red Hat Enterprise Linux 9 | affected |
| |||
| Red Hat | Red Hat OpenShift Container Platform 4 | affected |
| |||
| Red Hat | Red Hat Satellite 6 | affected |
| |||
| Red Hat | Red Hat Update Infrastructure 4 for Cloud Providers | affected |
|
- ≤ 0.7.36
- n/a
- 4.0
- 6.0
- 4
- 7.0
- 8.0
- 9.0
- 10.0
No data.
Red Hat Enterprise Linux 10
libsolv-0:0.7.33-5.el10_2
Fixed · RHSA-2026:28236
Red Hat Enterprise Linux 10.0 Extended Update Support
libsolv-0:0.7.29-8.el10_0.1
Fixed · RHSA-2026:48818
Red Hat Hardened Images
libsolv-main-0.7.38-2.hum1
Fixed · RHSA-2026:21333
Red Hat Hardened Images
libsolv-main-0.7.39-3.hum1
Fixed · RHSA-2026:30649
Red Hat Enterprise Linux 7
libsolv
Fix deferred
Red Hat Enterprise Linux 8
libsolv
Not affected
Red Hat Enterprise Linux 9
libsolv
Fix deferred
Red Hat OpenShift Container Platform 4
openshift/ose-rhel-coreos-8
Fix deferred
Red Hat OpenShift Container Platform 4
openshift/ose-rhel-coreos-9
Fix deferred
Red Hat Satellite 6
satellite-capsule:el8/libsolv
Fix deferred
Red Hat Update Infrastructure 4 for Cloud Providers
libsolv
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | libsolv-0:0.7.33-5.el10_2 | Fixed | RHSA-2026:28236 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | libsolv-0:0.7.29-8.el10_0.1 | Fixed | RHSA-2026:48818 |
| Red Hat Hardened Images | libsolv-main-0.7.38-2.hum1 | Fixed | RHSA-2026:21333 |
| Red Hat Hardened Images | libsolv-main-0.7.39-3.hum1 | Fixed | RHSA-2026:30649 |
| Red Hat Enterprise Linux 7 | libsolv | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | libsolv | Not affected | n/a |
| Red Hat Enterprise Linux 9 | libsolv | Fix deferred | n/a |
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-8 | Fix deferred | n/a |
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-9 | Fix deferred | n/a |
| Red Hat Satellite 6 | satellite-capsule:el8/libsolv | Fix deferred | n/a |
| Red Hat Update Infrastructure 4 for Cloud Providers | libsolv | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
Vendor solution
To mitigate this issue, ensure that libsolv only processes trusted and cryptographically signed Debian repository metadata. Avoid ingesting or processing `Packages` files from untrusted or unverified sources.
Red Hat statement
This Moderate impact flaw in libsolv's Debian metadata parser can lead to a denial of service due to a stack-based buffer overflow. Exploitation requires a victim to process specially crafted, untrusted Debian repository metadata containing malicious SHA384 or SHA512 checksums. While memory corruption occurs, reliable system compromise has not been demonstrated, and the vulnerability is not typically exposed in default Red Hat product configurations.
Red Hat mitigation
To mitigate this issue, ensure that libsolv only processes trusted and cryptographically signed Debian repository metadata. Avoid ingesting or processing `Packages` files from untrusted or unverified sources.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 21, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.58% (0.00581) | 45.76th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.35% (0.00350) | 26.64th | v5 (v2026.06.15) |
| May 21, 2026 | 0.01% (0.00012) | 1.69th | v4 (v2025.03.14) |
References (9)
- https://access.redhat.com/errata/RHSA-2026:21333 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:28236 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30649 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:48818 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-9150 vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2460379 issue-trackingx_refsource_REDHATIssue TrackingThird Party Advisory
- https://github.com/openSUSE/libsolv/pull/616 Issue TrackingPatch
- https://nvd.nist.gov/vuln/detail/CVE-2026-9150
- https://www.cve.org/CVERecord?id=CVE-2026-9150
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:21333 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2026:28236 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2026:30649 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2026:48818 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2026-9150 | vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2460379 | issue-trackingx_refsource_REDHATIssue TrackingThird Party Advisory | |
| https://github.com/openSUSE/libsolv/pull/616 | Issue TrackingPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-9150 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-9150 |
Change history (0)
No recorded changes yet.