CVE-2020-8231: debian debian_linux Use After Free
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2020-8231SUSE-SU-2020:14481-1SUSE-SU-2020:2444-1SUSE-SU-2020:2445-1SUSE-SU-2020:2446-1UBUNTU-CVE-2020-8231USN-4466-1USN-4466-2DEBIAN-CVE-2020-8231DLA-2382-1openSUSE-SU-2020:1345-1openSUSE-SU-2020:1359-1openSUSE-SU-2020:1494-1
Published 14-12-2020Last modified 14-10-2026
Vulnerability summary
CVE-2020-8231 is a high (CVSS 7.5) Use After Free vulnerability in debian debian_linux. EPSS estimates a 5.34% chance of exploitation in the next 30 days, higher than 92.5% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
5.34%
0%100%
Low · +1.58 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 6 · Related 3Timeline
- 14-12-2020PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
Due to use of a dangling pointer, libcurl 7.29.0 through 7.71.1 can use the wrong connection when sending data.
CVSS metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
5.34%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
+1.58 pp
From 3.77% on 18-09-2026
18-09-202618-10-2026
EPSS score5.34%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Suse6 products
- curl-openssl1&distro=SUSE Linux Enterprise Server 11-SECURITY< 7.37.0-70.52.2
- curl&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 7.60.0-3.32.1
- curl&distro=SUSE Linux Enterprise Module for Basesystem 15 SP2< 7.66.0-4.6.1
- curl&distro=SUSE Linux Enterprise Server 12 SP5< 7.60.0-11.6.1
- curl&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5< 7.60.0-11.6.1
Opensuse4 products
- curl-mini&distro=openSUSE Leap 15.1< 7.60.0-lp151.5.15.1
- curl-mini&distro=openSUSE Leap 15.2< 7.66.0-lp152.3.9.1
- curl&distro=openSUSE Leap 15.1< 7.60.0-lp151.5.15.1
- curl&distro=openSUSE Leap 15.2< 7.66.0-lp152.3.6.1 | < 7.66.0-lp152.3.9.1
Debian2 products
- curl< 7.52.1-5+deb9u12 | < 7.72.0-1
- debian_linuxEOL10.0
Alpine1 product
- curl< 7.66.0-r2 | < 7.67.0-r2 | < 7.69.1-r2 | < 7.72.0-r0 | < 7.66.0-r5
Haxx1 product
- libcurl≥ 7.29.0, ≤ 7.71.1
Oracle1 product
Siemens1 product
Splunk1 product
- universal_forwarder≥ 8.2.0, < 8.2.12 | ≥ 9.0.0, < 9.0.6 | 9.1.0
Ubuntu1 product
- curl< 7.47.0-1ubuntu2.16 | < 7.58.0-2ubuntu3.10 | < 7.68.0-1ubuntu2.2 | < 7.35.0-1ubuntu2.20+esm5
9 vendors · 18 products
References
27 linksShow all 27 references
- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory
- lists.opensuse.org/archives/…Advisory
