Description
inffast.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | rsync | 3.1.3-6 | — |
| Debian 14 | zlib | 1:1.2.8.dfsg-4 | — |
| Debian 13 | rsync | 3.1.3-6 | — |
| Debian 13 | zlib | 1:1.2.8.dfsg-4 | — |
| Debian 12 | rsync | 3.1.3-6 | — |
| Debian 12 | zlib | 1:1.2.8.dfsg-4 | — |
| Debian 8 | rsync | 3.1.1-3+deb8u2 | DLA-1725-1 |
| Debian 8 | zlib | 1:1.2.8.dfsg-2+deb8u1 | DLA-2085-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | zsync | No fix yet | — |
| Ubuntu 25.10 | klibc | 2.0.13-4ubuntu1 | — |
| Ubuntu 25.10 | zsync | No fix yet | — |
| Ubuntu 24.04 LTS | klibc | 2.0.13-4ubuntu0.1 | USN-6736-2 |
| Ubuntu 22.04 LTS | klibc | 2.0.10-4ubuntu0.1 | USN-6736-1 |
| Ubuntu 20.04 LTS | klibc | 2.0.7-1ubuntu5.2 | USN-6736-1 |
| Ubuntu 20.04 LTS | rsync | 3.1.3-6 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | rsync | 3.1.2-2.1ubuntu1.1 | USN-4292-1 |
| Ubuntu 16.04 LTS | rsync | 3.1.1-3ubuntu1.3 | USN-4292-1 |
| Ubuntu 16.04 LTS | zlib | 1:1.2.8.dfsg-2ubuntu4.3 | USN-4246-1 |
| Ubuntu Pro 18.04 LTS | klibc | 2.0.4-9ubuntu2.2+esm1 | USN-6736-1 |
| Ubuntu Pro 16.04 LTS | klibc | 2.0.4-8ubuntu1.16.04.4+esm2 | USN-6736-1 |
| Ubuntu Pro 14.04 LTS | klibc | 2.0.3-0ubuntu1.14.04.3+esm3 | USN-6736-1 |
| Ubuntu Pro 14.04 LTS | zlib | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | java-1.7.1-ibm +5 | 1:1.7.1.4.5-1jpp.1.el7_3 | RHSA-2017:1221 |
| RHEL 7 | java-1.8.0-ibm +5 | 1:1.8.0.4.5-1jpp.1.el7_3 | RHSA-2017:1220 |
| RHEL 6 | java-1.6.0-ibm +6 | 1:1.6.0.16.45-1jpp.1.el6_9 | RHSA-2017:1222 |
| RHEL 6 | java-1.7.1-ibm +5 | 1:1.7.1.4.5-1jpp.2.el6_9 | RHSA-2017:1221 |
| RHEL 6 | java-1.8.0-ibm +5 | 1:1.8.0.4.5-1jpp.1.el6_9 | RHSA-2017:1220 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Extras Oracle Java 7 | java-1.6.0-sun +5 | 1:1.6.0.171-1jpp.4.el7 | RHSA-2017:3047 |
| Red Hat Rhel Extras Oracle Java 7 | java-1.7.0-oracle +5 | 1:1.7.0.161-1jpp.4.el7 | RHSA-2017:3046 |
| Red Hat Rhel Extras Oracle Java 7 | java-1.8.0-oracle +5 | 1:1.8.0.151-1jpp.5.el7 | RHSA-2017:2999 |
| Red Hat Rhel Extras Oracle Java 6 | java-1.6.0-sun +5 | 1:1.6.0.171-1jpp.4.el6 | RHSA-2017:3047 |
| Red Hat Rhel Extras Oracle Java 6 | java-1.7.0-oracle +5 | 1:1.7.0.161-1jpp.3.el6 | RHSA-2017:3046 |
| Red Hat Rhel Extras Oracle Java 6 | java-1.8.0-oracle +5 | 1:1.8.0.151-1jpp.1.el6 | RHSA-2017:2999 |
| Red Hat Network Satellite 5 | java-1.8.0-ibm +1 | 1:1.8.0.5.5-1jpp.1.el6_9 | RHSA-2017:3453 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES 12 SP3 | java-1_7_1-ibm | 1.7.1_sr4.15-38.8.1 | SUSE-SU-2017:3455-1 |
| SLES 12 SP3 | java-1_8_0-ibm | 1.8.0_sr5.5-30.13.1 | SUSE-SU-2017:3411-1 |
| SLES 12 SP3 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SLES 12 SP2 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES 12 SP2 | java-1_7_1-ibm | 1.7.1_sr4.5-37.1 | SUSE-SU-2017:3455-1, SUSE-SU-2017:1385-1 |
| SLES 12 SP2 | java-1_8_0-ibm | 1.8.0_sr4.5-29.1 | SUSE-SU-2017:3411-1, SUSE-SU-2017:1386-1 |
| SLES 12 SP2 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SLES 12 SP2 | zlib | 1.2.8-11.1 | SUSE-SU-2017:0003-1 |
| SLES 12 SP1 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES 12 SP1 | java-1_7_1-ibm | 1.7.1_sr4.5-37.1 | SUSE-SU-2017:3455-1, SUSE-SU-2017:1385-1 |
| SLES 12 SP1 | java-1_8_0-ibm | 1.8.0_sr4.5-29.1 | SUSE-SU-2017:3411-1, SUSE-SU-2017:1386-1 |
| SLES 12 SP1 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SLES 12 SP1 | zlib | 1.2.8-6.3.1 | SUSE-SU-2017:0004-1 |
| SLES 12 | java-1_6_0-ibm | 1.6.0_sr16.45-49.1 | SUSE-SU-2017:3235-1, SUSE-SU-2017:1389-1 |
| SLES 12 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES 12 | java-1_7_1-ibm | 1.7.1_sr4.5-37.1 | SUSE-SU-2017:3455-1, SUSE-SU-2017:1385-1 |
| SLES 11 SP4 | java-1_7_1-ibm | 1.7.1_sr4.5-25.1 | SUSE-SU-2017:3440-1, SUSE-SU-2017:1387-1 |
| SLES 11 SP4 | zlib | 1.2.7-0.14.1 | SUSE-SU-2016:3209-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | java-1_6_0-ibm | 1.6.0_sr16.45-84.1 | SUSE-SU-2017:3369-1, SUSE-SU-2017:1444-1 |
| SLES 11 SP3 | java-1_7_0-ibm | 1.7.0_sr10.5-64.1 | SUSE-SU-2018:0061-1, SUSE-SU-2017:1384-1 |
| SUSE Studio Onsite 1.3 | zlib | 1.2.7-0.135.3.1 | SUSE-SU-2018:1815-1 |
| SLES for SAP 12 SP3 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES for SAP 12 SP3 | java-1_7_1-ibm | 1.7.1_sr4.15-38.8.1 | SUSE-SU-2017:3455-1 |
| SLES for SAP 12 SP3 | java-1_8_0-ibm | 1.8.0_sr5.5-30.13.1 | SUSE-SU-2017:3411-1 |
| SLES for SAP 12 SP3 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SLES for SAP 12 SP2 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES for SAP 12 SP2 | java-1_7_1-ibm | 1.7.1_sr4.5-37.1 | SUSE-SU-2017:3455-1, SUSE-SU-2017:1385-1 |
| SLES for SAP 12 SP2 | java-1_8_0-ibm | 1.8.0_sr4.5-29.1 | SUSE-SU-2017:3411-1, SUSE-SU-2017:1386-1 |
| SLES for SAP 12 SP2 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SLES for SAP 12 SP2 | zlib | 1.2.8-11.1 | SUSE-SU-2017:0003-1 |
| SLES for SAP 12 SP1 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES for SAP 12 SP1 | java-1_7_1-ibm | 1.7.1_sr4.5-37.1 | SUSE-SU-2017:3455-1, SUSE-SU-2017:1385-1 |
| SLES for SAP 12 SP1 | java-1_8_0-ibm | 1.8.0_sr4.5-29.1 | SUSE-SU-2017:3411-1, SUSE-SU-2017:1386-1 |
| SLES for SAP 12 SP1 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SLES for SAP 12 SP1 | zlib | 1.2.8-6.3.1 | SUSE-SU-2017:0004-1 |
| SLES for SAP 12 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SLES for SAP 12 | java-1_7_1-ibm | 1.7.1_sr4.5-37.1 | SUSE-SU-2017:1385-1 |
| SLES for SAP 11 SP4 | java-1_7_1-ibm | 1.7.1_sr4.5-25.1 | SUSE-SU-2017:3440-1, SUSE-SU-2017:1387-1 |
| SLES for SAP 11 SP4 | zlib | 1.2.7-0.14.1 | SUSE-SU-2016:3209-1 |
| SUSE OpenStack Cloud 6 | java-1_7_0-openjdk | 1.7.0.161-43.7.6 | SUSE-SU-2018:0005-1 |
| SUSE OpenStack Cloud 6 | java-1_7_1-ibm | 1.7.1_sr4.15-38.8.1 | SUSE-SU-2017:3455-1 |
| SUSE OpenStack Cloud 6 | java-1_8_0-ibm | 1.8.0_sr5.5-30.13.1 | SUSE-SU-2017:3411-1 |
| SUSE OpenStack Cloud 6 | java-1_8_0-openjdk | 1.8.0.151-27.8.1 | SUSE-SU-2017:2989-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | java-1_6_0-ibm | 1.6.0_sr16.45-84.1 | SUSE-SU-2017:3369-1, SUSE-SU-2017:1444-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | java-1_7_0-ibm | 1.7.0_sr10.5-64.1 | SUSE-SU-2018:0061-1, SUSE-SU-2017:1384-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.6 | perl | 5.24.3-r1 | — |
| Alpine v3.5 | perl | 5.24.3-r1 | — |
| Alpine v3.5 | zlib | 1.2.11-r0 | — |
| Alpine v3.4 | zlib | 1.2.11-r0 | — |
| Alpine v3.3 | zlib | 1.2.11-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | fltk | 1.3.8-1 | — |
| Azure Linux 3 | openjpeg2 | No fix yet | — |
Advisories 39
- RHSA-2017:3453 Red Hat Security Advisory: java-1.8.0-ibm security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:3047 Red Hat Security Advisory: java-1.6.0-sun security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:2999 Red Hat Security Advisory: java-1.8.0-oracle security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:3046 Red Hat Security Advisory: java-1.7.0-oracle security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:1222 Red Hat Security Advisory: java-1.6.0-ibm security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:1220 Red Hat Security Advisory: java-1.8.0-ibm security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:1221 Red Hat Security Advisory: java-1.7.1-ibm security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- ICSA-26-202-06 Siemens CADRA CISA ICS & IT advisories · Jul 21, 2026
- NCSC-2026-0229 Kwetsbaarheden verholpen in Siemens producten NCSC-NL (Netherlands) · Jul 14, 2026
- SSA-470355 SSA-470355: Zlib and Foxit Vulnerabilities in CADRA Siemens ProductCERT · Jul 14, 2026
- USN-6736-1 klibc vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- USN-6736-2 klibc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4292-1 rsync vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4246-1 zlib vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2085-1 zlib - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1725-1 rsync - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:0061-1 Security update for java-1_7_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3369-1 Security update for java-1_6_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1444-1 Security update for java-1_6_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1815-1 Security update for zlib SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3235-1 Security update for java-1_6_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0003-1 Security update for zlib SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1389-1 Security update for java-1_6_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1387-1 Security update for java-1_7_1-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3411-1 Security update for java-1_8_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3440-1 Security update for java-1_7_1-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3209-1 Security update for zlib SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:3455-1 Security update for java-1_7_1-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1386-1 Security update for java-1_8_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2989-1 Security update for java-1_8_0-openjdk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1384-1 Security update for java-1_7_0-ibm SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0005-1 Security update for java-1_7_0-openjdk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0004-1 Security update for zlib SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2024-1232 Rsync: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 17, 2025
- VDE-2019-009 PHOENIX CONTACT: Multiple Vulnerabilities in AXC F 2152 CERT@VDE · May 22, 2025
- SUSE-SU-2017:1385-1 Security update for java-1_7_1-ibm SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2025-0370 Apple Mac OS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 13, 2025
- ICSA-19-155-01 PHOENIX CONTACT PLCNext AXC F 2152 CISA ICS & IT advisories · Jun 4, 2019
References
- RHSA-2017:1221 vendor-advisory
- RHSA-2017:1220 vendor-advisory
- RHSA-2017:3047 vendor-advisory
- [oss-security] 20161205 Re: CVE Request: zlib security issues found during audit mailing-list
- 95131 vdb-entry
- RHSA-2017:3046 vendor-advisory
- openSUSE-SU-2017:0077 vendor-advisory
- 1039596 vdb-entry
- GLSA-201701-56 vendor-advisory
- 1039427 vdb-entry
- RHSA-2017:1222 vendor-advisory
- openSUSE-SU-2017:0080 vendor-advisory
- RHSA-2017:3453 vendor-advisory
- openSUSE-SU-2016:3202 vendor-advisory
- RHSA-2017:2999 vendor-advisory
- [debian-lts-announce] 20190324 [SECURITY] [DLA 1725-1] rsync security update mailing-list
- USN-4246-1 vendor-advisory
- [debian-lts-announce] 20200129 [SECURITY] [DLA 2085-1] zlib security update mailing-list
- USN-4292-1 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- https://support.apple.com/HT208144
- https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlib
- https://support.apple.com/HT208113
- https://support.apple.com/HT208112
- https://support.apple.com/HT208115
- https://wiki.mozilla.org/images/0/09/Zlib-report.pdf
- https://bugzilla.redhat.com/show_bug.cgi?id=1402346
- https://github.com/madler/zlib/commit/9aaec95e82117c1cb0f9624264c3618fc380cecb
- https://security.netapp.com/advisory/ntap-20171019-0001/
- GLSA-202007-54 vendor-advisory