Is CVE-2022-37434 in the CISA KEV catalog?

No. CVE-2022-37434 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-37434?

CVE-2022-37434 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-37434?

CVE-2022-37434 has an EPSS score of 16.00% (97th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-37434?

Upgrade libz-mingw-w64 on debian 12 to 1.2.12+dfsg-2 or later. Fixes are available for 19 affected products.

CVE & CISA-KEV Catalog

CVE-2022-37434

CRITICALEPSS 97th pctl

9.8

CVSS v3

NVD

Description

zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. NOTE: only applications that call inflateGetHeader are affected. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference).

CWE-787Out-of-bounds Write CWE-120Classic Buffer Overflow

How to fix

Remediation Available

libz-mingw-w64Debian

Fixed in:1.2.12+dfsg-2CVE-2022-37434

rsyncRocky

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsyncRed Hat / RHEL

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsync-daemonRocky

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsync-daemonRed Hat / RHEL

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsync-debuginfoRed Hat / RHEL

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsync-debuginfoRocky

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsync-debugsourceRocky

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

rsync-debugsourceRed Hat / RHEL

Fixed in:0:3.1.3-14.el8_6.5RHSA-2024:0254

klibcUbuntu

Fixed in:2.0.3-0ubuntu1.14.04.3+esm3USN-6736-1

Fixed in:2.0.4-8ubuntu1.16.04.4+esm2USN-6736-1

Fixed in:2.0.4-9ubuntu2.2+esm1USN-6736-1

Fixed in:2.0.7-1ubuntu5.2USN-6736-1

Fixed in:2.0.10-4ubuntu0.1USN-6736-1

Fixed in:2.0.13-1ubuntu0.1USN-6736-1

Fixed in:2.0.13-4ubuntu0.1USN-6736-2

klibc-utilsUbuntu

Fixed in:2.0.3-0ubuntu1.14.04.3+esm3USN-6736-1

Fixed in:2.0.4-8ubuntu1.16.04.4+esm2USN-6736-1

Fixed in:2.0.4-9ubuntu2.2+esm1USN-6736-1

Fixed in:2.0.7-1ubuntu5.2USN-6736-1

Fixed in:2.0.10-4ubuntu0.1USN-6736-1

Fixed in:2.0.13-1ubuntu0.1USN-6736-1

Fixed in:2.0.13-4ubuntu0.1USN-6736-2

lib32z1Ubuntu

Fixed in:1:1.2.8.dfsg-1ubuntu1.1+esm2USN-5570-1

Fixed in:1:1.2.8.dfsg-2ubuntu4.3+esm2USN-5570-1

Fixed in:1:1.2.11.dfsg-0ubuntu2.2USN-5570-1

Fixed in:1:1.2.11.dfsg-2ubuntu1.5USN-5570-2

Fixed in:1:1.2.11.dfsg-2ubuntu9.2USN-5570-2

lib64z1Ubuntu

Fixed in:1:1.2.8.dfsg-1ubuntu1.1+esm2USN-5570-1

Fixed in:1:1.2.8.dfsg-2ubuntu4.3+esm2USN-5570-1

Fixed in:1:1.2.11.dfsg-0ubuntu2.2USN-5570-1

Fixed in:1:1.2.11.dfsg-2ubuntu1.5USN-5570-2

Fixed in:1:1.2.11.dfsg-2ubuntu9.2USN-5570-2

libklibcUbuntu

Fixed in:2.0.3-0ubuntu1.14.04.3+esm3USN-6736-1

Fixed in:2.0.4-8ubuntu1.16.04.4+esm2USN-6736-1

Fixed in:2.0.4-9ubuntu2.2+esm1USN-6736-1

Fixed in:2.0.7-1ubuntu5.2USN-6736-1

Fixed in:2.0.10-4ubuntu0.1USN-6736-1

Fixed in:2.0.13-1ubuntu0.1USN-6736-1

Fixed in:2.0.13-4ubuntu0.1USN-6736-2

libx32z1Ubuntu

Fixed in:1:1.2.8.dfsg-1ubuntu1.1+esm2USN-5570-1

Fixed in:1:1.2.8.dfsg-2ubuntu4.3+esm2USN-5570-1

Fixed in:1:1.2.11.dfsg-0ubuntu2.2USN-5570-1

Fixed in:1:1.2.11.dfsg-2ubuntu1.5USN-5570-2

Fixed in:1:1.2.11.dfsg-2ubuntu9.2USN-5570-2

rsyncUbuntu

Fixed in:3.1.1-3ubuntu1.3+esm2USN-5573-1

Fixed in:3.1.2-2.1ubuntu1.5USN-5573-1

Fixed in:3.1.3-8ubuntu0.4USN-5573-1

zlibUbuntu

Fixed in:1:1.2.8.dfsg-1ubuntu1.1+esm2USN-5570-1

Fixed in:1:1.2.8.dfsg-2ubuntu4.3+esm2USN-5570-1

Fixed in:1:1.2.11.dfsg-0ubuntu2.2USN-5570-1

Fixed in:1:1.2.11.dfsg-2ubuntu1.5USN-5570-2

Fixed in:1:1.2.11.dfsg-2ubuntu9.2USN-5570-2

zlib-binUbuntu

Fixed in:1:1.2.8.dfsg-1ubuntu1.1+esm2USN-5570-1

zlib1gUbuntu

Fixed in:1:1.2.8.dfsg-1ubuntu1.1+esm2USN-5570-1

Fixed in:1:1.2.8.dfsg-2ubuntu4.3+esm2USN-5570-1

Fixed in:1:1.2.11.dfsg-0ubuntu2.2USN-5570-1

Fixed in:1:1.2.11.dfsg-2ubuntu1.5USN-5570-2

Fixed in:1:1.2.11.dfsg-2ubuntu9.2USN-5570-2

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

16.00%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-14.