Not analysed yet
We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | ADP (CISA-ADP) |
- CISA KEV Not listed.
- EPSS 0.052, the 92nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
Sources
References from the CNA
- access.redhat.com/errata/RHSA-2017:1221
- access.redhat.com/errata/RHSA-2017:1220
- access.redhat.com/errata/RHSA-2017:3047
- www.openwall.com/lists/oss-security/2016/12/05/21
- www.securityfocus.com/bid/95131
- access.redhat.com/errata/RHSA-2017:3046
- lists.opensuse.org/opensuse-updates/2017-01/msg00050.html
- security.gentoo.org/glsa/201701-56
- www.securitytracker.com/id/1039427
- access.redhat.com/errata/RHSA-2017:1222
- lists.opensuse.org/opensuse-updates/2017-01/msg00053.html
- access.redhat.com/errata/RHSA-2017:3453
- lists.opensuse.org/opensuse-updates/2016-12/msg00127.html
- access.redhat.com/errata/RHSA-2017:2999
- lists.debian.org/debian-lts-announce/2019/03/msg00027.html
- usn.ubuntu.com/4246-1/
- lists.debian.org/debian-lts-announce/2020/01/msg00030.html
- usn.ubuntu.com/4292-1/
- www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- www.oracle.com/security-alerts/cpujul2020.html
- www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- support.apple.com/HT208144
- wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlib
- support.apple.com/HT208113
- support.apple.com/HT208112
- support.apple.com/HT208115
- wiki.mozilla.org/images/0/09/Zlib-report.pdf
- bugzilla.redhat.com/show_bug.cgi?id=1402348
- github.com/madler/zlib/commit/e54e1299404101a5a9d0cf5e45512b543967f958
- security.gentoo.org/glsa/202007-54