CVE-2022-37434

Exp

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).

Published: 2022-08-05 Last update: 2025-05-30 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-37434 is rated High Exploit Risk (89.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 92.75%, 100th percentile). 4 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-37434

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-37434

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-10 92.54% 92.75% +0.20%
2 2026-05-18 92.75% 92.54% -0.20%
3 2026-05-08 — 92.75% —

Full EPSS history (33 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-37434

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2022-37434

OS Trackers for CVE-2022-37434

vendor priority summary link
alpine — CVE-2022-37434: 2 source package rows (zlib, zlib-ng); 20 state rows across 14 repos (3.17-community, 3.17-main, 3.18-community, 3.18-main, 3.19-community, 3.19-main, 3.20-community, 3.20-main, 3.21-community, 3.21-main, 3.22-community, 3.22-main, edge-community, edge-main); fixed 15, open 5. https://security.alpinelinux.org/vuln/CVE-2022-37434
debian not yet assigned CVE-2022-37434 not yet assigned priority: Debian including 2 source packages (libz-mingw-w64, zlib), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9, open 1. https://security-tracker.debian.org/tracker/CVE-2022-37434
gentoo normal CVE-2022-37434: 1 GLSA(s) (202210-42), 1 atom(s) (sys-libs/zlib); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-37434
redhat medium — https://access.redhat.com/security/cve/CVE-2022-37434
suse high CVE-2022-37434 severity important: SUSE including 917 source package names (0.23.0.3.2.201:libz1-1.2.11-150000.3.33.1, 1.1.0-build4.19.12:libz1-1.2.11-150000.3.33.1, …), 2181 product×package rows across 285 product lines (Container bci/bci-init, Container bci/bci-minimal, … (285 product lines)): Known Not Affected 1086, Fixed 1001, Known Affected 94. https://www.suse.com/security/cve/CVE-2022-37434/
ubuntu medium CVE-2022-37434 medium priority: Ubuntu including 3 source packages (klibc, rsync, zlib), 26 status rows across 9 suites (bionic, focal, jammy, kinetic, mantic, noble, trusty, upstream, xenial): released 16, not-affected 8, needs-triage 2. https://ubuntu.com/security/CVE-2022-37434

Affected software / configurations for CVE-2022-37434

Vendor Product Version Raw CPE
zlib zlib <= 1.2.12 cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*
fedoraproject fedora 35 cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
fedoraproject fedora 36 cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
fedoraproject fedora 37 cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
netapp hci — cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:*
netapp management_services_for_element_software — cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*
netapp oncommand_workflow_automation — cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
netapp ontap_select_deploy_administration_utility — cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
netapp storagegrid — cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:*
netapp hci_compute_node — cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
netapp h300s_firmware — cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
netapp h500s_firmware — cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
netapp h700s_firmware — cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
apple ipados < 15.7.1 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 15.7.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone_os >= 16.0, < 16.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos >= 11.0, < 11.7.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 12.0.0, < 12.6.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple watchos < 9.1 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
stormshield stormshield_network_security >= 3.7.31, < 3.7.34 cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:*
stormshield stormshield_network_security >= 3.11.0, < 3.11.22 cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:*
stormshield stormshield_network_security >= 4.3.0, < 4.3.16 cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:*
stormshield stormshield_network_security >= 4.6.0, < 4.6.3 cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:*

References for CVE-2022-37434

URL Tags
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
cvelogic Threat Intelligence