CVE catalog
CVE-2018-20406
Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a "resize to twice the size" attempt. This issue might cause memory exhaustion,
- Severity
- High · CVSS 7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 5.79% · Oct 25, 2026
Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a "resize to twice the size" attempt. This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data. This issue is fixed in: v3.4.10, v3.4.10rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.7rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.7, v3.6.7rc1, v3.6.7rc2, v3.6.8, v3.6.8rc1, v3.6.9, v3.6.9rc1; v3.7.1, v3.7.1rc1, v3.7.1rc2, v3.7.2, v3.7.2rc1, v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | python | Not reported | 3.7.1 | fixed |
| Cpe | debian_linux | Not reported | Not reported | unknown |
| Cpe | fedora | Not reported | Not reported | unknown |
| Cpe | fedora | Not reported | Not reported | unknown |
| Cpe | fedora | Not reported | Not reported | unknown |
| Ubuntu | python3.4 | pro | 3.4~b1-0ubuntu3 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~b1-4ubuntu4 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~b1-4ubuntu6 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~b1-5ubuntu2 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~b2-1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~b3-1ubuntu1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~rc1-1build1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~rc2-1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4~rc3-0ubuntu1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.0-1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.0-2ubuntu1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.0-2ubuntu1.1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.1 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.3 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.4 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.5 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.6 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.7 | vulnerable |
| Ubuntu | python3.4 | pro | 3.4.3-1ubuntu1~14.04.7+esm2 | fixed |
| Ubuntu | python3.5 | pro | 3.5.2-2ubuntu0~16.04.4~14.04.1 | vulnerable |
| Ubuntu | python3.5 | pro | 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1 | fixed |
| Ubuntu | python3.5 | 16.04 | 3.5.0-3 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.0-3ubuntu1 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1~rc1-2ubuntu1 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-1 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-2 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-3 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-5 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-6ubuntu1 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-6ubuntu2 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-9ubuntu1 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.1-10 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2~16.01 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2~16.04 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2ubuntu0~16.04.1 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2ubuntu0~16.04.2 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2ubuntu0~16.04.3 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2ubuntu0~16.04.4 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2ubuntu0~16.04.5 | vulnerable |
| Ubuntu | python3.5 | 16.04 | 3.5.2-2ubuntu0~16.04.8 | fixed |
| Ubuntu | python3.6 | 18.04 | 3.6.3-1ubuntu1 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.4~rc1-1 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.4~rc1-2 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.4-1 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.4-2 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.4-3build1 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.4-4 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.5~rc1-1 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.5-3 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.6-1~18.04 | vulnerable |
| Ubuntu | python3.6 | 18.04 | 3.6.7-1~18.04 | fixed |
| Debian | python3.5 | 9 | 3.5.3-1 | vulnerable |
| Debian | python3.5 | 9 | 3.5.3-1+deb9u1 | vulnerable |
| Debian | python3.5 | 9 | 3.5.3-1+deb9u2 | fixed |
| Suse | python3 | linux enterprise module for basesystem 15 | 3.6.5-3.8.1 | fixed |
| Suse | python3-base | linux enterprise module for basesystem 15 | 3.6.5-3.8.1 | fixed |
| Suse | python3-base | linux enterprise module for development tools 15 | 3.6.5-3.8.1 | fixed |
| Suse | python3 | openstack cloud 7 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | openstack cloud 7 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise desktop 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise desktop 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise desktop 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise desktop 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise module for web and scripting 12 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise module for web and scripting 12 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server for sap applications 12 sp2 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server for sap applications 12 sp2 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise software development kit 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise software development kit 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise software development kit 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server 12-ltss | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server 12-ltss | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server 12 sp1-ltss | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server 12 sp1-ltss | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server 12 sp2-ltss | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server 12 sp2-ltss | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server 12 sp2-bcl | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server 12 sp2-bcl | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server for sap applications 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server for sap applications 12 sp3 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server for sap applications 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server for sap applications 12 sp4 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | enterprise storage 4 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | enterprise storage 4 | 3.4.6-25.21.1 | fixed |
| Suse | python3 | linux enterprise server for sap applications 12 sp1 | 3.4.6-25.21.1 | fixed |
| Suse | python3-base | linux enterprise server for sap applications 12 sp1 | 3.4.6-25.21.1 | fixed |
| Opensuse | python3 | leap 15.0 | 3.6.5-lp150.2.6.1 | fixed |
| Opensuse | python3-base | leap 15.0 | 3.6.5-lp150.2.6.1 | fixed |
| Alpine | python3 | 3.6 | 3.6.8-r0 | fixed |
| Alpine | python3 | 3.7 | 3.6.8-r0 | fixed |
| Alpine | python3 | 3.8 | 3.6.8-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | python | cpe | Not reported | 3.7.1 | Not reported | NVD-CVE-2018-20406 | Not reported |
| Ubuntu | python3.4 | deb | pro | 3.4.3-1ubuntu1~14.04.7+esm2 | Not reported | UBUNTU-CVE-2018-20406 | Not reported |
| Ubuntu | python3.5 | deb | pro | 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1 | Not reported | UBUNTU-CVE-2018-20406 | Not reported |
| Ubuntu | python3.5 | deb | 16.04 | 3.5.2-2ubuntu0~16.04.8 | Not reported | UBUNTU-CVE-2018-20406 | Not reported |
| Ubuntu | python3.6 | deb | 18.04 | 3.6.7-1~18.04 | Not reported | UBUNTU-CVE-2018-20406 | Not reported |
| Debian | python3.5 | deb | 9 | 3.5.3-1+deb9u2 | Not reported | DLA-2280-1 | Not reported |
| Suse | python3 | rpm | linux enterprise module for basesystem 15 | 3.6.5-3.8.1 | Not reported | SUSE-SU-2019:0215-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise module for basesystem 15 | 3.6.5-3.8.1 | Not reported | SUSE-SU-2019:0215-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise module for development tools 15 | 3.6.5-3.8.1 | Not reported | SUSE-SU-2019:0215-1 | Not reported |
| Suse | python3 | rpm | openstack cloud 7 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | openstack cloud 7 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise desktop 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise desktop 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise desktop 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise desktop 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise module for web and scripting 12 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise module for web and scripting 12 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server for sap applications 12 sp2 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server for sap applications 12 sp2 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise software development kit 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise software development kit 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise software development kit 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server 12-ltss | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server 12-ltss | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server 12 sp1-ltss | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server 12 sp1-ltss | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server 12 sp2-ltss | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server 12 sp2-ltss | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server 12 sp2-bcl | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server 12 sp2-bcl | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server for sap applications 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server for sap applications 12 sp3 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server for sap applications 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | linux enterprise server for sap applications 12 sp4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | enterprise storage 4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3-base | rpm | enterprise storage 4 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-1 | Not reported |
| Suse | python3 | rpm | linux enterprise server for sap applications 12 sp1 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-2 | Not reported |
| Suse | python3-base | rpm | linux enterprise server for sap applications 12 sp1 | 3.4.6-25.21.1 | Not reported | SUSE-SU-2019:0243-2 | Not reported |
| Opensuse | python3 | rpm | leap 15.0 | 3.6.5-lp150.2.6.1 | Not reported | OPENSUSE-SU-2019:0155-1 | Not reported |
| Opensuse | python3-base | rpm | leap 15.0 | 3.6.5-lp150.2.6.1 | Not reported | OPENSUSE-SU-2019:0155-1 | Not reported |
| Alpine | python3 | apk | 3.6 | 3.6.8-r0 | Not reported | ALPINE-CVE-2018-20406 | Not reported |
| Alpine | python3 | apk | 3.7 | 3.6.8-r0 | Not reported | ALPINE-CVE-2018-20406 | Not reported |
| Alpine | python3 | apk | 3.8 | 3.6.8-r0 | Not reported | ALPINE-CVE-2018-20406 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2019_0215-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2018-20406]
- [https://osv.dev/vulnerability/ALPINE-CVE-2018-20406]
- [https://osv.dev/vulnerability/DLA-2280-1]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0215-1]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0243-1]
- [https://osv.dev/vulnerability/SUSE-SU-2019:0243-2]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2018-20406]
- [https://osv.dev/vulnerability/openSUSE-SU-2019:0155-1]
- [https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-20406.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2019/wid-sec-w-2024-1601.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]