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No exploitation reportedFix available

CVE-2021-33938

No exploitation reported by the sources we read.

  • Published2021-09-02
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Timeline

dates in UTC
  1. 2021-09-0215:15CVE publishedNVD

Versions per branch

NVD
Opensuse libsolv
BranchAffectedFixed in
0.7≤ 0.7.17no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • candlepinRed Hat:satellite:6.11::el8all versions · fixed in 0:4.1.13-1.el8sat
  • candlepinRed Hat:satellite:6.11::el7all versions · fixed in 0:4.1.13-1.el7sat
  • foremanRed Hat:satellite:6.11::el8all versions · fixed in 0:3.1.1.21-2.el8sat
  • foremanRed Hat:satellite:6.11::el7all versions · fixed in 0:3.1.1.21-2.el7sat
  • foremanRed Hat:satellite_utils:6.11::el8all versions · fixed in 0:3.1.1.21-2.el8sat
  • foremanRed Hat:satellite_utils:6.11::el7all versions · fixed in 0:3.1.1.21-2.el7sat
  • foremanRed Hat:satellite_capsule:6.11::el8all versions · fixed in 0:3.1.1.21-2.el8sat
  • foremanRed Hat:satellite_capsule:6.11::el7all versions · fixed in 0:3.1.1.21-2.el7sat

33 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-33938 Red Hat Product Security112 products fixed · 7 known affected

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

    libsolv as a component of Red Hat Enterprise Linux 7 · libsolv-demo as a component of Red Hat Enterprise Linux 7 · libsolv-devel as a component of Red Hat Enterprise Linux 7 · +4 more

  • RHSA-2022:5498 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Satellite 6.11 Release

  • RHSA-2021:4060 Red Hat Product Security89 products fixed

    Red Hat Security Advisory: libsolv security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2022:5498 · 8 productsFor Red Hat Satellite 6.11 see the following documentation for the release. https://access.redhat.com/documentation/en-us/red_hat_satellite/6.11 The important instructions on how to upgrade are available below. https://access.redhat.com/documentation/en-us/red_hat_satellite/6.11/html/upgrading_and…
  2. Vendor fix Red Hat Product Security RHSA-2021:4060 · 89 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. No fix planned, says the vendor Red Hat Product Security CVE-2021-33938 · 6 productsOut of support scope
  4. No fix planned, says the vendor Red Hat Product Security CVE-2021-33938 · 1 productWill not fix

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-09-02
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h7mv-xp82-8pqc

Frequently asked questions

What is CVE-2021-33938?

Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial of Service.

Is CVE-2021-33938 actively exploited?

Active exploitation of CVE-2021-33938 has not been confirmed. Its EPSS score was 1.4% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-33938?

CVE-2021-33938 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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