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NVD / CVE Program· CNA mitre

CVE-2021-44568: Two heap-overflow vulnerabilities exist in openSUSE/libsolv libsolv through 13 Dec 2020 in the decisionmap variable via the resolve_dependen

Noroxi assessment

Priority: Monitor (action score 27/100)

  • 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: 1.7% (FIRST EPSS); higher than 78.1% of all records.
  • 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 (Debian:12) 0.7.17-1; foreman (Red Hat:satellite_capsule:6.11::el7) 0:3.1.1.21-2.el7sat; libsolv (Red Hat:satellite_capsule:6.11::el7) 0:0.7.22-1.el7pc.

Low priority for now. Upgrade to libsolv (Debian:12) 0.7.17-1; foreman (Red Hat:satellite_capsule:6.11::el7) 0:3.1.1.21-2.el7sat; libsolv (Red Hat:satellite_capsule:6.11::el7) 0:0.7.22-1.el7pc 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

Two heap-overflow vulnerabilities exist in openSUSE/libsolv libsolv through 13 Dec 2020 in the decisionmap variable via the resolve_dependencies function at src/solver.c (line 1940 & line 1995), which could cause a remote Denial of Service.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Feb 21, 2022
Updated
Jun 17, 2026
EPSS
1.7% · 78th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.7%

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.

Follow CVE-2021-44568

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?

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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

Affected versions

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

  • opensuse libsolvbefore 0.7.17

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12libsolvbefore 0.7.17-10.7.17-1
Red Hat:satellite_capsule:6.11::el7foremanbefore 0:3.1.1.21-2.el7sat0:3.1.1.21-2.el7sat
Red Hat:satellite_capsule:6.11::el7libsolvbefore 0:0.7.22-1.el7pc0:0.7.22-1.el7pc
Red Hat:satellite_capsule:6.11::el7satellitebefore 0:6.11.0-2.el7sat0:6.11.0-2.el7sat
Red Hat:satellite_capsule:6.11::el8foremanbefore 0:3.1.1.21-2.el8sat0:3.1.1.21-2.el8sat
Red Hat:satellite_capsule:6.11::el8libsolvbefore 0:0.7.22-1.el8pc0:0.7.22-1.el8pc
Red Hat:satellite_capsule:6.11::el8python-djangobefore 0:3.2.13-1.el8pc0:3.2.13-1.el8pc
Red Hat:satellite_capsule:6.11::el8python-lxmlbefore 0:4.7.1-1.el8pc0:4.7.1-1.el8pc
Red Hat:satellite_capsule:6.11::el8python-sqlparsebefore 0:0.4.2-2.el8pc0:0.4.2-2.el8pc
Red Hat:satellite_capsule:6.11::el8python38-djangobefore 0:3.2.13-1.el8pc0:3.2.13-1.el8pc
Red Hat:satellite_capsule:6.11::el8satellitebefore 0:6.11.0-2.el8sat0:6.11.0-2.el8sat
Red Hat:satellite:6.11::el7candlepinbefore 0:4.1.13-1.el7sat0:4.1.13-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-actionpackbefore 0:6.0.4.7-1.el7sat0:6.0.4.7-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-pumabefore 0:5.6.2-1.el7sat0:5.6.2-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-puma-debuginfobefore 0:5.6.2-1.el7sat0:5.6.2-1.el7sat
Red Hat:satellite:6.11::el7tfm-rubygem-sidekiqbefore 0:5.2.10-1.el7sat0:5.2.10-1.el7sat
Red Hat:satellite:6.11::el8candlepinbefore 0:4.1.13-1.el8sat0:4.1.13-1.el8sat
Red Hat:satellite:6.11::el8rubygem-actionpackbefore 0:6.0.4.7-1.el8sat0:6.0.4.7-1.el8sat
Red Hat:satellite:6.11::el8rubygem-pumabefore 0:5.6.2-1.el8sat0:5.6.2-1.el8sat
Red Hat:satellite:6.11::el8rubygem-puma-debuginfobefore 0:5.6.2-1.el8sat0:5.6.2-1.el8sat
Red Hat:satellite:6.11::el8rubygem-puma-debugsourcebefore 0:5.6.2-1.el8sat0:5.6.2-1.el8sat
Red Hat:satellite:6.11::el8rubygem-sidekiqbefore 0:5.2.10-1.el8sat0:5.2.10-1.el8sat
Rocky Linux:8libdbbefore 0:5.3.28-42.el8_40:5.3.28-42.el8_4

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

Published before and after this one in the same product

  • ← EarlierCVE-2021-33930Sep 2, 2021 · Buffer overflow vulnerability in function pool_installable_whatprovides in src/repo.h in libsolv before 0.7.17 allows attackers to cause a D
    30Monitor
  • ← EarlierCVE-2021-33938Sep 2, 2021 · Buffer 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
  • Later →CVE-2026-9150May 20, 2026 · Libsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha384/sha512 checksums
    26Monitor

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
debian:libsolv0.7.17-1 · Debian:12Package registry (OSV)
red hat:candlepin0:4.1.13-1.el7sat · Red Hat:satellite:6.11::el7Package registry (OSV)
red hat:foreman0:3.1.1.21-2.el7sat · Red Hat:satellite_capsule:6.11::el7Package registry (OSV)
red hat:libsolv0:0.7.22-1.el7pc · Red Hat:satellite_capsule:6.11::el7Package registry (OSV)
red hat:python-django0:3.2.13-1.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:python-lxml0:4.7.1-1.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:python-sqlparse0:0.4.2-2.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:python38-django0:3.2.13-1.el8pc · Red Hat:satellite_capsule:6.11::el8Package registry (OSV)
red hat:rubygem-puma0:5.6.2-1.el8sat · Red Hat:satellite:6.11::el8Package registry (OSV)
red hat:satellite0:6.11.0-2.el7sat · Red Hat:satellite_capsule:6.11::el7Package registry (OSV)
red hat:tfm-rubygem-actionpack0:6.0.4.7-1.el7sat · Red Hat:satellite:6.11::el7Package registry (OSV)
red hat:tfm-rubygem-puma0:5.6.2-1.el7sat · Red Hat:satellite:6.11::el7Package registry (OSV)
red hat:tfm-rubygem-sidekiq0:5.2.10-1.el7sat · Red Hat:satellite:6.11::el7Package registry (OSV)
rocky linux:libdb0:5.3.28-42.el8_4 · Rocky Linux:8Package registry (OSV)

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.

No commit or PR link among the references.

Credits

All researchers

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

No credits in the CNA record.

Variant candidates

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

No nightly-computed relations.

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-787 · Out-of-bounds Write

CVSS vector

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

nvd-primary

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✗ → ✓

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