CVE-2022-37434

9.8 critical exploit ×2 SSVC exploitation: poc Modified

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).

Fix

Public exploits 2

Trinadh465/external_zlib_CVE-2022-37434 PoC on GitHub
xen0bit/CVE-2022-37434_poc PoC on GitHub

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Patch, vendor advisory and mitigation references on NVD 4

http://www.openwall.com/lists/oss-security/2022/08/09/1 Mailing List, Patch, Third Party Advisory
https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1 Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/08/09/1 Mailing List, Patch, Third Party Advisory
https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1 Patch, Third Party Advisory

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

2026-10-15 00:45First seenCVSS 9.8 · zlib, fedoraproject, debianNVD modified 2026-10-14 18:17

Affected (CPE criteria) 21

cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:*

References 59

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://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
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://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/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
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