Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2022-37434

CVE-2022-37434CRITICAL

n/a n/a — 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.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .1897   97.3     —

AFFECTED
  Product  Versions     Fixed
  n/a      unspecified  —

TIMELINE
  Aug 5   Reserved by mitre
  Aug 5   Published (CNA: mitre)
  Oct 14  EXPLOIT PUBLISHED — CVE-2022-37434. Public exploit reference added.

CWE-787, CWE-120 · CNA: mitre · CVSS v3.1 · 32 references · NVD status: Modified

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).

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 5, 2022	Reserved	Reserved by mitre
August 5, 2022	Published	Published (CNA: mitre)
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2022-37434. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	—	—

Weaknesses

CWE-787 · CWE-120

References (32)

http://seclists.org/fulldisclosure/2022/Oct/37 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/38 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/41 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2022/Oct/42 [Mailing List, Third Party Advisory]
http://www.openwall.com/lists/oss-security/2022/08/05/2 [Mailing List, Third Party Advisory]
http://www.openwall.com/lists/oss-security/2022/08/09/1 [Mailing List, Patch, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-150063.html
https://cert-portal.siemens.com/productcert/html/ssa-202008.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-470355.html
https://cert-portal.siemens.com/productcert/html/ssa-561322.html
https://github.com/curl/curl/issues/9271 [Exploit, Issue Tracking, Third Party Advisory]
https://github.com/ivd38/zlib_overflow [Exploit, Third Party Advisory]
https://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063 [Exploit, Third Party Advisory]
https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d
https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1 [Patch, Third Party Advisory]
https://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764 [Exploit, Third Party Advisory]
https://lists.debian.org/debian-lts-announce/2022/09/msg00012.html [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JWN4VE3JQR4O2SOUS5TXNLANRPMHWV4I/ [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMBOJ77A7T7PQCARMDUK75TE6LLESZ3O/ [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAVPQNCG3XRLCLNSQRM3KAN5ZFMVXVTY/ [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X5U7OTKZSHY2I3ZFJSR2SHFHW72RKGDK/ [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YRQAI7H4M4RQZ2IWZUEEXECBE5D56BH2/ [Mailing List, Third Party Advisory]
https://security.netapp.com/advisory/ntap-20220901-0005/ [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20230427-0007/ [Third Party Advisory]
https://support.apple.com/kb/HT213488 [Third Party Advisory]
https://support.apple.com/kb/HT213489 [Third Party Advisory]
https://support.apple.com/kb/HT213490 [Third Party Advisory]
https://support.apple.com/kb/HT213491 [Third Party Advisory]
https://support.apple.com/kb/HT213493 [Third Party Advisory]
https://support.apple.com/kb/HT213494 [Third Party Advisory]
https://www.debian.org/security/2022/dsa-5218 [Third Party Advisory]

Authoritative record: CVE-2022-37434 at cve.org

Weaknesses: CWE-787 · CWE-120

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2022-37434 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.