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CVE-2026-9150· NVD / CVE Program· CNA redhat

Libsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha384/sha512 checksums

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.58% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: libsolv (AlmaLinux:10) 0.7.33-5.el10_2.alma.1; libsolv-devel (AlmaLinux:10) 0.7.33-5.el10_2.alma.1; libsolv-tools (AlmaLinux:10) 0.7.33-5.el10_2.alma.1.

Low priority for now. Upgrade to libsolv (AlmaLinux:10) 0.7.33-5.el10_2.alma.1; libsolv-devel (AlmaLinux:10) 0.7.33-5.el10_2.alma.1; libsolv-tools (AlmaLinux:10) 0.7.33-5.el10_2.alma.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
May 20, 2026
Updated
Sep 1, 2026
EPSS
0.5% · 46th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opensuselibsolv
redhathardened images
redhatopenshift container platform
redhatsatellite
redhatupdate infrastructure
redhatenterprise linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • opensuse libsolvup to 0.7.36 inclusive
  • redhat enterprise linux10.0
  • redhat enterprise linux7.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0
  • redhat hardened imagesall versions
  • redhat openshift container platform4.0
  • redhat satellite6.0
  • redhat update infrastructure4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • 0:0.7.33-5.el10_2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

    • 0:0.7.29-8.el10_0.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsaffected

  • Red Hat Red Hat Hardened Images

    • 0.7.38-2.hum1 and laternot affected · rpm
    • 0.7.39-3.hum1 and laternot affected · rpm

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsaffected
    • all versionsaffected

  • Red Hat Red Hat Satellite 6

    • all versionsaffected

  • Red Hat Red Hat Update Infrastructure 4 for Cloud Providers

    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10libsolvbefore 0.7.33-5.el10_2.alma.10.7.33-5.el10_2.alma.1
AlmaLinux:10libsolv-develbefore 0.7.33-5.el10_2.alma.10.7.33-5.el10_2.alma.1
AlmaLinux:10libsolv-toolsbefore 0.7.33-5.el10_2.alma.10.7.33-5.el10_2.alma.1
AlmaLinux:10libsolv-tools-basebefore 0.7.33-5.el10_2.alma.10.7.33-5.el10_2.alma.1
AlmaLinux:10python3-solvbefore 0.7.33-5.el10_2.alma.10.7.33-5.el10_2.alma.1
Debian:12libsolvall versions—
Debian:14libsolvbefore 0.7.37-10.7.37-1
openSUSE:Leap 16.0libsolvbefore 0.7.39-160000.1.10.7.39-160000.1.1
openSUSE:Leap 16.0libzyppbefore 17.38.13-160000.1.117.38.13-160000.1.1
openSUSE:Leap 16.0zypperbefore 1.14.98-160000.1.11.14.98-160000.1.1
openSUSE:Tumbleweedlibsolvbefore 0.7.38-1.10.7.38-1.1
Red Hat:enterprise_linux_eus:10.0libsolvbefore 0:0.7.29-8.el10_0.10:0.7.29-8.el10_0.1
Red Hat:enterprise_linux_eus:10.0libsolv-debuginfobefore 0:0.7.29-8.el10_0.10:0.7.29-8.el10_0.1
Red Hat:enterprise_linux_eus:10.0libsolv-debugsourcebefore 0:0.7.29-8.el10_0.10:0.7.29-8.el10_0.1
Red Hat:enterprise_linux:10.2libsolvbefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-debuginfobefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-debugsourcebefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-demo-debuginfobefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-develbefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-toolsbefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-tools-basebefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-tools-base-debuginfobefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2libsolv-tools-debuginfobefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2
Red Hat:enterprise_linux:10.2perl-solv-debuginfobefore 0:0.7.33-5.el10_20:0.7.33-5.el10_2

+35

Same product

opensuse: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-48864Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data
    31Monitor
  • CVE-2019-20387repodata_schema2id in repodata.c in libsolv before 0.7.6 has a heap-based buffer over-read via a last schema whose length is less than the l
    31Monitor
  • CVE-2026-48863Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
    30Monitor
  • CVE-2021-33938Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial o
    30Monitor
  • CVE-2021-33930Buffer overflow vulnerability in function pool_installable_whatprovides in src/repo.h in libsolv before 0.7.17 allows attackers to cause a D
    30Monitor
  • CVE-2021-33929Buffer overflow vulnerability in function pool_disabled_solvable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial o
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:libsolv0.7.33-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libsolv-devel0.7.33-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libsolv-tools0.7.33-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libsolv-tools-base0.7.33-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:python3-solv0.7.33-5.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
debian:libsolv0.7.37-1 · Debian:14Package registry (OSV)
opensuse:libsolv0.7.38-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:libzypp17.38.13-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:zypper1.14.98-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
red hat:libsolv0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libsolv-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libsolv-debugsource0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libsolv-demo0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libsolv-demo-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libsolv-devel0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libsolv-devel0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libsolv-tools0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libsolv-tools0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libsolv-tools-base0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libsolv-tools-base-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libsolv-tools-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:perl-solv0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:perl-solv-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:python3-solv0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:python3-solv0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:python3-solv-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:ruby-solv0:0.7.38-2.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:ruby-solv-debuginfo0:0.7.33-5.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
rocky linux:libsolv0:0.7.33-5.el10_2 · Rocky Linux:10Package registry (OSV)
suse:libsolv0.7.39-160000.1.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

+2

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4886356 days apartLibsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
    30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records