CVE-2021-33938: opensuse libsolv Out-of-bounds Write
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-33938DEBIAN-CVE-2021-33938
Published 02-09-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-33938 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in opensuse libsolv. EPSS estimates a 1.42% chance of exploitation in the next 30 days, higher than 72.4% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
1.42%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 2Timeline
- 02-09-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.42%
Chance of exploitation in the next 30 days
Percentile
72%
Versus all other CVEs
30-day change
0.00 pp
From 1.42% on 18-09-2026
18-09-202618-10-2026
EPSS score1.42%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundLibsolv
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- libsolv< 0.7.17-1
Opensuse1 product
- libsolv≤ 0.7.17
Ubuntu1 product
- libsolvAll versions (No fix recorded)
3 vendors · 3 products
References
6 links- github.com/openSUSE/libsolv/issues/420X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory
