CVE-2018-20406 @ morris

"CVE-2018-20406"
"python-backports-ssl_match_hostname-3.5.0.1-1.el7"
"python-decorator-3.4.0-3.el7"
"python-javapackages-3.4.1-11.el7"
"python-ply-3.4-11.el7"
"python"
"python-babel"
"python-backports"
"python-chardet"
"python-cllib"
"alt-python27-2.7.18-9.el7"
"alt-python27-alembic-0.8.3-3.el7"
"alt-python27-argparse-1.2.1-2.el7.cloudlinux"
"alt-python27-babel-1.3-7.el7"
"alt-python27-beaker-1.5.4-10.el7"
"alt-python27-chardet-2.3.0-2.el7"
"alt-python27-cllib-3.4.44-1.el7.cloudlinux"
"Am I vulnerable?"

Status

new

Priority

7.0

Match score

4.0

Risk

DoS Remote

CVSS

7.5 HIGH

Reason

cpe: python; pkgs: python, python-babel, python-backports, python-backports-ssl_match_hostname, python-chardet, python-cllib; version: in-range: python-backports-ssl_match_hostname-3.5.0.1-1.el7, python-decorator-3.4.0-3.el7, python-javapackages-3.4.1-11.el7, python-ply-3.4-11.el7; risk:dos

Created

2026-10-16T10:16:53Z

Updated

2026-10-20T10:18:02Z

Package interrogation (copy)

Run on the host — click to copy a command. RPM

Package	Commands
python-backports-ssl_match_hostname-3.5.0.1-1.el7
python-decorator-3.4.0-3.el7
python-javapackages-3.4.1-11.el7
python-ply-3.4-11.el7
python
python-babel
python-backports
python-chardet
python-cllib
alt-python27-2.7.18-9.el7
alt-python27-alembic-0.8.3-3.el7
alt-python27-argparse-1.2.1-2.el7.cloudlinux
alt-python27-babel-1.3-7.el7
alt-python27-beaker-1.5.4-10.el7
alt-python27-chardet-2.3.0-2.el7
alt-python27-cllib-3.4.44-1.el7.cloudlinux
alt-python27-contextlib2-0.5.4-1.2.el7
alt-python27-crypto-2.6.1-1.el7
alt-python27-dateutil-1.4.1-6.el7.cloudlinux
alt-python27-docopt-0.6.2-1.el7
alt-python27-editor-0.4-4.el7
alt-python27-future-0.17.0-2.el7
alt-python27-guppy-0.1.10-1.el7
alt-python27-jinja2-2.7.2-8.el7
alt-python27-jsonschema-2.6.0-1.el7
alt-python27-libs-2.7.18-9.el7
alt-python27-lprettytable-0.5-2.el7.cloudlinux
alt-python27-lxml-3.2.4-1.el7
alt-python27-mako-0.7.3-1.el7
alt-python27-markupsafe-0.23-6.el7.cloudlinux.2
alt-python27-matplotlib-1.0.1-21.el7.cloudlinux.1
alt-python27-MySQL-common-1.2.5-1.el7.cloudlinux.2
alt-python27-MySQL-mariadb101-1.2.5-1.el7.cloudlinux.2
alt-python27-MySQL-mariadb10-1.2.5-1.el7.cloudlinux.2
alt-python27-MySQL-mariadb102-1.2.5-1.el7.cloudlinux.3
alt-python27-MySQL-mariadb103-1.2.5-1.el7.cloudlinux.4
alt-python27-MySQL-mariadb104-1.2.5-1.el7.cloudlinux.5
alt-python27-MySQL-mariadb105-1.2.5-1.el7.cloudlinux.5
alt-python27-MySQL-mariadb106-1.2.5-1.el7.cloudlinux.5

Inventory lookup

Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.

Suggestions: python-backports-ssl_match_hostname · python-decorator · python-javapackages · python-ply · python · python-babel · python-backports · python-chardet · python-cllib

System	Matches	Ticket for CVE-2018-20406
morris	python-decorator 3.4.0	new open
mufasa	python-decorator 3.4.0	new open

Same product CVEs in your queue

Other open tickets that look like the same product. Closed tickets are omitted unless they are already pegged to this CVE.

CVE	CVSS	Systems	Status	Matched	Already related
CVE-2022-37454	9.8	Archive, morris, mufasa	new	python-backports	—
CVE-2021-3518	8.8	morris, mufasa	new	python	—
CVE-2021-3517	8.6	morris, mufasa	new	python	—
CVE-2023-26604	7.8	mufasa	new	python	—
CVE-2022-40304	7.8	morris, mufasa	new	python	—
CVE-2022-0391	7.5	Archive, Library, Matrix, Saiph, morris …	new	python-backports	—
CVE-2023-24329	7.5	Archive, Library, Saiph, morris, mufasa	new	python-backports	—
CVE-2024-34459	7.5	morris, mufasa	new	python	—
CVE-2022-23308	7.5	morris, mufasa	new	python	—
CVE-2022-40303	7.5	morris, mufasa	new	python	—
CVE-2022-48560	7.5	Archive, Library, Matrix, Saiph, Silk …	new	python-backports	—
CVE-2022-45061	7.5	Archive, Bullseye, Helios, Library, Saiph …	new	python-backports	—
CVE-2024-25062	7.5	morris, mufasa	new	python	—
CVE-2021-3737	7.5	Helios	new	python	—
CVE-2021-28861	7.4	morris, mufasa	new	python-decorator	—

Related CVE (same fix)

Point this ticket’s CVE at a higher-priority / same-fix primary so you only triage one.

Host OS / kernel

CloudLinux release 7.9 (Boris Yegorov) (7.9) · cloudlinux

Arch

x86_64

kernel_release

uname -r → 3.10.0-962.3.2.lve1.5.89.el7.x86_64

kernel_version

uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026

For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.

Same CVE on other hosts

Open the ticket for this CVE on another system.

System	Status	Priority	Updated
mufasa	new	7.0	2026-10-20T10:18:02Z	Open

Description

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.

Update status

Add note only

References

NVD: CVE-2018-20406