CVE-2021-44568: opensuse libsolv Out-of-bounds Write
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-44568DEBIAN-CVE-2021-44568
Published 21-02-2022Last modified 04-08-2024
Vulnerability summary
CVE-2021-44568 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in opensuse libsolv. EPSS estimates a 1.79% chance of exploitation in the next 30 days, higher than 77.9% of scored vulnerabilities. 2 public exploits are recorded.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.79%
0%100%
Low · -0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2github
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 21-02-2022PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Medium 4.3Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.79%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
-0.01 pp
From 1.79% on 18-09-2026
18-09-202618-10-2026
EPSS score1.79%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundLibsolv
Maturity: poc
Poc
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
7 links- github.com/openSUSE/libsolv/issues/425X Refsource MISCREPORTExploitIssue TrackingThird Party Advisory
- github.com/yangjiageng/PoC/blob/master/libsolv-PoCs/resolve_dependencies-1940X Refsource MISCREPORTExploitThird Party Advisory
- github.com/yangjiageng/PoC/blob/master/libsolv-PoCs/resolve_dependencies-1995X Refsource MISCREPORTExploitThird Party Advisory
