CVE-2022-37434

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

17.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 96.9% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-07-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-08-05 00:00Z4 YR AGO

Last updated

2026-07-14 11:54Z1 MO AGO

Reserved

2022-08-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
• CWE-787Out-of-bounds WriteBase
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.2

Document digest

83ba9796fd623cc3e7aceac8664a610616c0c9e0fa4ad25a14c330d569bae728

• github.comhttps://github.com/ivd38/zlib_overflow
• github.comhttps://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1
• github.comhttps://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063
• github.comhttps://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764
• www.openwall.com[oss-security] 20220805 zlib buffer overflowhttp://www.openwall.com/lists/oss-security/2022/08/05/2mailing-list
• github.comhttps://github.com/curl/curl/issues/9271
• www.openwall.com[oss-security] 20220808 Re: zlib buffer overflowhttp://www.openwall.com/lists/oss-security/2022/08/09/1mailing-list
• lists.fedoraproject.orgFEDORA-2022-25e4dbedf9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YRQAI7H4M4RQZ2IWZUEEXECBE5D56BH2/vendor-advisory
• www.debian.orgDSA-5218https://www.debian.org/security/2022/dsa-5218vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-15da0cf165https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMBOJ77A7T7PQCARMDUK75TE6LLESZ3O/vendor-advisory
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20220901-0005/
• lists.fedoraproject.orgFEDORA-2022-b8232d1ccahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWN4VE3JQR4O2SOUS5TXNLANRPMHWV4I/vendor-advisory
• lists.debian.org[debian-lts-announce] 20220912 [SECURITY] [DLA 3103-1] zlib security updatehttps://lists.debian.org/debian-lts-announce/2022/09/msg00012.htmlmailing-list
• lists.fedoraproject.orgFEDORA-2022-3c28ae0cd8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5U7OTKZSHY2I3ZFJSR2SHFHW72RKGDK/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-0b517a5397https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAVPQNCG3XRLCLNSQRM3KAN5ZFMVXVTY/vendor-advisory
• support.apple.comhttps://support.apple.com/kb/HT213489
• support.apple.comhttps://support.apple.com/kb/HT213488
• support.apple.comhttps://support.apple.com/kb/HT213494
• support.apple.comhttps://support.apple.com/kb/HT213493
• support.apple.comhttps://support.apple.com/kb/HT213491
• support.apple.comhttps://support.apple.com/kb/HT213490
• seclists.org20221030 APPLE-SA-2022-10-27-5 Additional information for APPLE-SA-2022-10-24-2 macOS Ventura 13http://seclists.org/fulldisclosure/2022/Oct/41mailing-list
• seclists.org20221030 APPLE-SA-2022-10-27-2 Additional information for APPLE-SA-2022-10-24-1 iOS 16.1 and iPadOS 16http://seclists.org/fulldisclosure/2022/Oct/38mailing-list
• seclists.org20221030 APPLE-SA-2022-10-27-1 iOS 15.7.1 and iPadOS 15.7.1http://seclists.org/fulldisclosure/2022/Oct/37mailing-list
• seclists.org20221030 APPLE-SA-2022-10-27-6 Additional information for APPLE-SA-2022-10-24-3 macOS Monterey 12.6.1http://seclists.org/fulldisclosure/2022/Oct/42mailing-list
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20230427-0007/
• github.comhttps://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-561322.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-150063.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-202008.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-470355.html