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CVE-2026-27171

Published: Feb 18, 2026Updated: Feb 20, 2026 Sources: CVE List NVD BDUCWE-1284
NVD MITRE
2.9CVSSLOW
EPSS Score
0.2%
Top 89.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

zlib before 1.3.2 allows CPU consumption via crc32_combine64 and crc32_combine_gen64 because x2nmodp can do right shifts within a loop that has no termination condition.

CVSS Vector Breakdown

AV:LAC:HPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-1284

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Red Hat build of OpenJDKRed Hat Inc.
LibraryLibrary
OSS Libraries / generic-library
Red Hat OpenShift Container PlatformRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / container-orchestration
red hat inc.commercialUSOperating Systemsaka red hat
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 4 more affected products View all →

Exploitability

Official Patch Available

References

https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/
7asecurity.com
https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf
7asecurity.com
https://github.com/madler/zlib/issues/904
github.com
and 10 more references View all →

Timeline

Published
Feb 18, 2026
Last Updated
Feb 20, 2026

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