CVE-2020-25637: opensuse leap Double Free
Vulnerability summary
CVE-2020-25637 is a high (CVSS 7.2) Double Free vulnerability in opensuse leap. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.
Not severe (CVSS 6.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 11Timeline
- 06-10-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated6.4MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- NVDNIST6.7MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.53%
Chance of exploitation in the next 30 days
Percentile
45%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.53% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat33 products
- libvirt< 6.8.0
- libvirt< 0:4.5.0-36.el7_9.3
- libvirt-admin< 0:4.5.0-36.el7_9.3
- libvirt-bash-completion< 0:4.5.0-36.el7_9.3
- libvirt-client< 0:4.5.0-36.el7_9.3
Alpine1 product
- libvirt< 6.6.0-r3 | < 6.8.0-r0
Debian1 product
- libvirt< 3.0.0-4+deb9u5 | < 6.8.0-1
Mageia1 product
- libvirt< 5.5.0-1.3.mga7
Opensuse1 product
- leapEOL15.1 | 15.2
Ubuntu1 product
- libvirtAll versions (No fix recorded) | < 4.0.0-1ubuntu8.21 | < 6.0.0-0ubuntu8.16
6 vendors · 38 products
References
18 links- lists.opensuse.org/opensuse-security-announce/2020-10/msg00072.htmlVendor AdvisoryMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00073.htmlVendor AdvisoryMailing ListThird Party Advisory
