CVE-2016-5421
Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.
02 Description
Use-after-free vulnerability in libcurl before 7.50.1 allows attackers to control which connection is used or possibly have unspecified other impact via unknown vectors.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 8.03% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 94.7% of scored records. A rank, not a probability.
- NVD base score
- 8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-08-10 14:00Z10 YR AGO
- Last updated
- 2024-08-06 01:01Z2 YR AGO
- Reserved
- 2016-06-10
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.1
- Document digest
- 08ae73184a0d19f66bb3c4a1e391f9676a489e95af16dd283bfdc2079c88dfcf
05 Affected products
06 References
- access.redhat.comRHSA-2018:3558https://access.redhat.com/errata/RHSA-2018:3558
- source.android.comhttps://source.android.com/security/bulletin/2016-12-01.html
- www.slackware.comSSA:2016-219-01http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.563059
- www.securityfocus.com92306http://www.securityfocus.com/bid/92306
- www.debian.orgDSA-3638http://www.debian.org/security/2016/dsa-3638
- curl.haxx.sehttps://curl.haxx.se/docs/adv_20160803C.html
- lists.opensuse.orgopenSUSE-SU-2016:2227http://lists.opensuse.org/opensuse-updates/2016-09/msg00011.html
- www.tenable.comhttps://www.tenable.com/security/tns-2016-18
- lists.opensuse.orgopenSUSE-SU-2016:2379http://lists.opensuse.org/opensuse-updates/2016-09/msg00094.html
- www.securitytracker.com1036536http://www.securitytracker.com/id/1036536
- lists.fedoraproject.orgFEDORA-2016-24316f1f56https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/
- www.oracle.comhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- lists.fedoraproject.orgFEDORA-2016-8354baae0fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/
- security.gentoo.orgGLSA-201701-47https://security.gentoo.org/glsa/201701-47
- www.ubuntu.comUSN-3048-1http://www.ubuntu.com/usn/USN-3048-1
07 Fixed in
Debian 12
- curl Fixed in 7.50.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- curl Fixed in 7.50.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- curl Fixed in 7.50.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- curl Fixed in 7.35.0-1ubuntu2.8
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- curl Fixed in 7.47.0-1ubuntu2.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.