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CVE-2021-33928

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17...

7.5 HighFix available

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.47%Up 1.0 points since Sep 3, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
CVE-2021-33928
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-787
Updated
2026-11-02
CVE List No score

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
CVE-2021-33928
Updated
2026-11-02
EUVDEUVD-2021-20599 No score

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
EUVD-2021-20599
Updated
2026-11-03
GitHub AdvisoriesGHSA-v7jg-mp2h-m48g No score

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17...

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
GHSA-v7jg-mp2h-m48g
Weakness
CWE-787
Updated
2026-11-02
OSV 7.5

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
CVE-2021-33928
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2021-33928 7.5

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
DEBIAN-CVE-2021-33928
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVRHSA-2021:4060 7.5

Red Hat Security Advisory: libsolv security update

Record
RHSA-2021:4060
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2022:5498 9.4

Red Hat Security Advisory: Satellite 6.11 Release

Record
RHSA-2022:5498
CVSS 3.1
9.4 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Updated
2026-11-02
OSVRLSA-2021:4060 7.5

Moderate: libsolv security update

The libsolv packages provide a library for resolving package dependencies using a satisfiability algorithm.

Security Fix(es):

  • libsolv: heap-based buffer overflow in pool_installable() in src/repo.h (CVE-2021-33928)

  • libsolv: heap-based buffer overflow in pool_disabled_solvable() in src/repo.h (CVE-2021-33929)

  • libsolv: heap-based buffer overflow in pool_installable_whatprovides() in src/repo.h (CVE-2021-33930)

  • libsolv: heap-based buffer overflow in prune_to_recommended() in src/policy.c (CVE-2021-33938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2021:4060
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-33928 7.5

Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Record
UBUNTU-CVE-2021-33928
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVALSA-2021:4060 No score

Moderate: libsolv security update

The libsolv packages provide a library for resolving package dependencies using a satisfiability algorithm.

Security Fix(es):

  • libsolv: heap-based buffer overflow in pool_installable() in src/repo.h (CVE-2021-33928)

  • libsolv: heap-based buffer overflow in pool_disabled_solvable() in src/repo.h (CVE-2021-33929)

  • libsolv: heap-based buffer overflow in pool_installable_whatprovides() in src/repo.h (CVE-2021-33930)

  • libsolv: heap-based buffer overflow in prune_to_recommended() in src/policy.c (CVE-2021-33938)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2021:4060
Updated
2026-11-02
OSVRLSA-2022:5498 No score

Moderate: Satellite 6.11 Release

Rocky Enterprise Software Foundation Satellite is a systems management tool for Linux-based infrastructure. It allows for provisioning, remote management, and monitoring of multiple Linux deployments with a single centralized tool.

Security Fix(es):

  • libsolv: Heap-based buffer overflow in testcase_read() in src/testcase.c (CVE-2021-3200)
  • satellite: foreman: Authenticate remote code execution through Sendmail configuration (CVE-2021-3584)
  • candlepin: Allow unintended SCA certificate to authenticate Candlepin (CVE-2021-4142)
  • candlepin: netty: Information disclosure via the local system temporary directory (CVE-2021-21290)
  • candlepin: netty: Possible request smuggling in HTTP/2 due missing validation (CVE-2021-21295)
  • candlepin: netty: Request smuggling via content-length header (CVE-2021-21409)
  • tfm-rubygem-sidekiq: XSS via the queue name of the live-poll feature (CVE-2021-30151)
  • python-sqlparse: ReDoS via regular expression in StripComments filter (CVE-2021-32839)
  • libsolv: various flaws (CVE-2021-33928 CVE-2021-33929 CVE-2021-33930 CVE-2021-33938)
  • tfm-rubygem-puma: Inconsistent Interpretation of HTTP Requests in puma (CVE-2021-41136)
  • logback-classic: Remote code execution through JNDI call from within its configuration file (CVE-2021-42550)
  • candlepin: netty: Control chars in header names may lead to HTTP request smuggling (CVE-2021-43797)
  • python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)
  • python3-django: Potential bypass of an upstream access control based on URL paths (CVE-2021-44420)
  • libsolv: Heap overflow (CVE-2021-44568)
  • python3-django: Various flaws (CVE-2021-45115 CVE-2021-45116 CVE-2021-45452 CVE-2022-22818)
  • tfm-rubygem-actionpack: Information leak between requests (CVE-2022-23633)
  • tfm-rubygem-puma: rubygem-rails: Information leak between requests (CVE-2022-23634)
  • python3-django: Denial-of-service possibility in file uploads (CVE-2022-23833)
  • tfm-rubygem-sidekiq: WebUI Denial of Service caused by number of days on graph (CVE-2022-23837)
  • python3-django: Various flaws (CVE-2022-28346 CVE-2022-28347)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

  • New repo layout for Satellite, Utils, Maintenance, and Client repos.
  • Support for Rocky Linux 9 clients
  • Module-based installation on Rocky Linux 8
  • Upgrading Satellite Server and Capsule Server installations from Rocky Linux 7 to Rocky Linux 8
  • Connected and Disconnected servers supported on Rocky Linux 7 and Rocky Linux 8
  • Inter-Server Synchronization improvements
  • Puppet integration optional and disabled by default
  • Pulp 3 updated to Python 3.8
  • Change to Capsule certificate archive
  • New default port for communication with Rocky Enterprise Software Foundation Subscription Management * (RHSM) API on Capsule servers
  • New Content Views Page (Content Publication workflow simplification)
  • New Hosts Page (Technology Preview)
  • Registration and preview templates
  • Simplified host content source changing
  • Improved behavior for configuring and running remote jobs
  • Provisioning improvements
  • New error signaling unsupported options in TASK-Filter
  • Virt-who configuration enhanced to support Nutanix AHV
  • Cloud Connector configuration updated
  • Improved Insights adoption

The items above are not a complete list of changes. This update also fixes several bugs and adds various enhancements. Documentation for these changes is available from the Release Notes document linked to in the References section.

Record
RLSA-2022:5498
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libsolv-devel
AlmaLinux:8
From an advisory covering 4 CVEs
before 0.7.16-3.el8_4
0.7.16-3.el8_4
libsolv-tools
AlmaLinux:8
From an advisory covering 4 CVEs
before 0.7.16-3.el8_4
0.7.16-3.el8_4
libsolv
Debian:12
before 0.7.17-1
0.7.17-1
libsolv
Debian:13
before 0.7.17-1
0.7.17-1
libsolv
Debian:14
before 0.7.17-1
0.7.17-1
libsolv
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-debugsource
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-demo-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-tools-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
Show 53 moreShow less
Affected packages
PackageAffectedFixed
perl-solv-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
python3-solv
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
python3-solv-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
ruby-solv-debuginfo
Red Hat:enterprise_linux:8::baseos
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-debugsource
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-demo-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-devel
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-tools
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv-tools-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
perl-solv-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
python3-solv-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
ruby-solv-debuginfo
Red Hat:enterprise_linux:8::crb
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libsolv
Red Hat:satellite_capsule:6.11::el7
From an advisory covering 28 CVEs
before 0:0.7.22-1.el7pc
0:0.7.22-1.el7pc
libsolv
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:0.7.22-1.el7pc
0:0.7.22-1.el7pc
libsolv
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:0.7.22-1.el8pc
0:0.7.22-1.el8pc
libsolv
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:0.7.22-1.el8pc
0:0.7.22-1.el8pc
foreman
Red Hat:satellite_capsule:6.11::el7
From an advisory covering 28 CVEs
before 0:3.1.1.21-2.el7sat
0:3.1.1.21-2.el7sat
foreman
Red Hat:satellite_utils:6.11::el7
From an advisory covering 28 CVEs
before 0:3.1.1.21-2.el7sat
0:3.1.1.21-2.el7sat
foreman
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:3.1.1.21-2.el7sat
0:3.1.1.21-2.el7sat
foreman
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:3.1.1.21-2.el8sat
0:3.1.1.21-2.el8sat
foreman
Red Hat:satellite_utils:6.11::el8
From an advisory covering 28 CVEs
before 0:3.1.1.21-2.el8sat
0:3.1.1.21-2.el8sat
foreman
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:3.1.1.21-2.el8sat
0:3.1.1.21-2.el8sat
satellite
Red Hat:satellite_capsule:6.11::el7
From an advisory covering 28 CVEs
before 0:6.11.0-2.el7sat
0:6.11.0-2.el7sat
satellite
Red Hat:satellite_utils:6.11::el7
From an advisory covering 28 CVEs
before 0:6.11.0-2.el7sat
0:6.11.0-2.el7sat
satellite
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:6.11.0-2.el7sat
0:6.11.0-2.el7sat
satellite
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:6.11.0-2.el8sat
0:6.11.0-2.el8sat
satellite
Red Hat:satellite_utils:6.11::el8
From an advisory covering 28 CVEs
before 0:6.11.0-2.el8sat
0:6.11.0-2.el8sat
satellite
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:6.11.0-2.el8sat
0:6.11.0-2.el8sat
candlepin
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:4.1.13-1.el7sat
0:4.1.13-1.el7sat
candlepin
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:4.1.13-1.el8sat
0:4.1.13-1.el8sat
tfm-rubygem-sidekiq
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:5.2.10-1.el7sat
0:5.2.10-1.el7sat
python-sqlparse
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:0.4.2-2.el8pc
0:0.4.2-2.el8pc
python-sqlparse
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:0.4.2-2.el8pc
0:0.4.2-2.el8pc
tfm-rubygem-puma
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:5.6.2-1.el7sat
0:5.6.2-1.el7sat
rubygem-puma
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:5.6.2-1.el8sat
0:5.6.2-1.el8sat
python-lxml
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:4.7.1-1.el8pc
0:4.7.1-1.el8pc
python-lxml
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:4.7.1-1.el8pc
0:4.7.1-1.el8pc
python-django
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:3.2.13-1.el8pc
0:3.2.13-1.el8pc
python-django
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:3.2.13-1.el8pc
0:3.2.13-1.el8pc
python38-django
Red Hat:satellite_capsule:6.11::el8
From an advisory covering 28 CVEs
before 0:3.2.13-1.el8pc
0:3.2.13-1.el8pc
python38-django
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:3.2.13-1.el8pc
0:3.2.13-1.el8pc
tfm-rubygem-actionpack
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:6.0.4.7-1.el7sat
0:6.0.4.7-1.el7sat
rubygem-actionpack
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:6.0.4.7-1.el8sat
0:6.0.4.7-1.el8sat
tfm-rubygem-puma-debuginfo
Red Hat:satellite:6.11::el7
From an advisory covering 28 CVEs
before 0:5.6.2-1.el7sat
0:5.6.2-1.el7sat
rubygem-puma-debuginfo
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:5.6.2-1.el8sat
0:5.6.2-1.el8sat
rubygem-puma-debugsource
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:5.6.2-1.el8sat
0:5.6.2-1.el8sat
rubygem-sidekiq
Red Hat:satellite:6.11::el8
From an advisory covering 28 CVEs
before 0:5.2.10-1.el8sat
0:5.2.10-1.el8sat
libsolv
Rocky Linux:8
From an advisory covering 4 CVEs
before 0:0.7.16-3.el8_4
0:0.7.16-3.el8_4
libdb
Rocky Linux:8
From an advisory covering 28 CVEs
before 0:5.3.28-42.el8_4
0:5.3.28-42.el8_4
libsolv
Ubuntu:Pro:16.04:LTS
All versions, plus listed versions
0.6.11-10.6.11-1build10.6.11-1.10.6.11-1.1ubuntu0.1~esm1
None known
libsolv
Ubuntu:Pro:18.04:LTS
All versions, plus listed versions
0.6.28-2build10.6.30-1build10.6.30-1ubuntu0.1~esm1
None known
libsolv
Ubuntu:20.04:LTS
All versions, plus listed versions
0.6.35-2ubuntu10.6.35-2ubuntu20.6.36-10.6.36-2
None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-33928 is a high vulnerability (CVSS 7.5) in Opensuse Libsolv, published September 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.47%, the 73rd percentile. Fixed in libsolv 0.7.17-1.

References

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Left out here: 391 references. The JSON record has them.

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