zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in…
Priority HIGH 75CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 14 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-120 and the CVSS impact.
Summary
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).
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.19243 97th percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD
Fix Partial Red Hat: 7 advisoriesRed Hat: 14 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | — | — | No fix listed | CNA |
- — Vendor— Affected — Fixed in — No fix listed CNA
CPE configurations NVD · 24
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:* | up to 1.2.12 | Vulnerable | zlib |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:* Versions up to 1.2.12 Vulnerable ·zlib
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 14 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 15.7.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 15.7.1; 16.0 to before 16.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | 11.0 to before 11.7.1; 12.0.0 to before 12.6.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | before 9.1 | Vulnerable | Apple |
| cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:* | 3.7.31 to before 3.7.34; 3.11.0 to before 3.11.22; 4.3.0 to before 4.3.16; 4.6.0 to before 4.6.3 | Vulnerable | Stormshield |
- cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 15.7.1 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 15.7.1; 16.0 to before 16.1 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.7.1; 12.0.0 to before 12.6.1 Vulnerable ·Apple
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 9.1 Vulnerable ·Apple
- cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:* Versions 3.7.31 to before 3.7.34; 3.11.0 to before 3.11.22; 4.3.0 to before 4.3.16; 4.6.0 to before 4.6.3 Vulnerable ·Stormshield
Remediation
Red Hat 7 advisories
- RHSA-2024:0254 Released 2024-01-15 · Red Hat rating Moderatersync security update
- Red Hat Enterprise Linux BaseOS EUS (v.8.6) rsync-3.1.3-14.el8_6.5, rsync-daemon-3.1.3-14.el8_6.5
- RHSA-2023:1095 Released 2023-03-07 · Red Hat rating Moderatezlib security update
- Red Hat Enterprise Linux Client (v. 7) zlib-1.2.7-21.el7_9
- Red Hat Enterprise Linux Client Optional (v. 7) minizip-1.2.7-21.el7_9, minizip-devel-1.2.7-21.el7_9, zlib-devel-1.2.7-21.el7_9 +1
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) minizip-1.2.7-21.el7_9, minizip-devel-1.2.7-21.el7_9, zlib-devel-1.2.7-21.el7_9 +1
- Red Hat Enterprise Linux Server (v. 7) zlib-1.2.7-21.el7_9, zlib-1.2.7-21.el7_9.ppc, zlib-devel-1.2.7-21.el7_9 +1
- Red Hat Enterprise Linux Server Optional (v. 7) minizip-1.2.7-21.el7_9, minizip-1.2.7-21.el7_9.ppc, minizip-devel-1.2.7-21.el7_9 +3
- Red Hat Enterprise Linux Workstation (v. 7) zlib-1.2.7-21.el7_9, zlib-devel-1.2.7-21.el7_9
- Red Hat Enterprise Linux Workstation Optional (v. 7) minizip-1.2.7-21.el7_9, minizip-devel-1.2.7-21.el7_9, zlib-static-1.2.7-21.el7_9
- RHSA-2022:8841 Released 2022-12-08 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP Server 2.4.51 SP1 security update
- Red Hat JBoss Core Services
Show 4 more Red Hat advisories
- RHSA-2022:8291 Released 2022-11-15 · Red Hat rating Moderatersync security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 9) rsync-daemon-3.2.3-18.el9
- Red Hat Enterprise Linux BaseOS (v. 9) rsync-3.2.3-18.el9
- RHSA-2022:7793 Released 2022-11-08 · Red Hat rating Moderatersync security and enhancement update
- Red Hat Enterprise Linux BaseOS (v. 8) rsync-3.1.3-19.el8, rsync-daemon-3.1.3-19.el8
- RHSA-2022:7314 Released 2022-11-02 · Red Hat rating Moderatezlib security update
- Red Hat CodeReady Linux Builder (v. 9) zlib-static-1.2.11-32.el9_0
- Red Hat Enterprise Linux AppStream (v. 9) zlib-devel-1.2.11-32.el9_0
- Red Hat Enterprise Linux BaseOS (v. 9) zlib-1.2.11-32.el9_0
- RHSA-2022:7106 Released 2022-10-25 · Red Hat rating Moderatezlib security update
- Red Hat Enterprise Linux BaseOS (v. 8) zlib-1.2.11-19.el8_6, zlib-devel-1.2.11-19.el8_6
- Red Hat Enterprise Linux CRB (v. 8) zlib-static-1.2.11-19.el8_6
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat build of Quarkus | Affected | No fix planned: Will not fix |
| Red Hat CodeReady Linux Builder (v. 9) | Fixed | RHSA-2022:7314 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2022:7314, RHSA-2022:8291 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2022:7106, RHSA-2022:7793 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2022:7314, RHSA-2022:8291 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.6) | Fixed | RHSA-2024:0254 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2022:7106 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2023:1095 |
| Red Hat JBoss Core Services | Fixed | RHSA-2022:8841 |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-37434
- 2026-10-03 Alias added: GHSA-cfmr-vrgj-vqwv
- 2026-10-09 Fix available: RHSA-2022:8841 · Red Hat
- 2026-10-16 Fix available: Red Hat JBoss Core Services · Red Hat
References
Exploit 4
Patch 2
Advisory 20
- [oss-security] 20220805 zlib buffer overflow
- FEDORA-2022-25e4dbedf9
- DSA-5218
- FEDORA-2022-15da0cf165
- https://security.netapp.com/advisory/ntap-20220901-0005/
- FEDORA-2022-b8232d1cca
- [debian-lts-announce] 20220912 [SECURITY] [DLA 3103-1] zlib security update
- FEDORA-2022-3c28ae0cd8
- FEDORA-2022-0b517a5397
- https://support.apple.com/kb/HT213489
- https://support.apple.com/kb/HT213488
- https://support.apple.com/kb/HT213494
- https://support.apple.com/kb/HT213493
- https://support.apple.com/kb/HT213491
- https://support.apple.com/kb/HT213490
- 20221030 APPLE-SA-2022-10-27-5 Additional information for APPLE-SA-2022-10-24-2 macOS Ventura 13
- 20221030 APPLE-SA-2022-10-27-2 Additional information for APPLE-SA-2022-10-24-1 iOS 16.1 and iPadOS 16
- 20221030 APPLE-SA-2022-10-27-1 iOS 15.7.1 and iPadOS 15.7.1
- 20221030 APPLE-SA-2022-10-27-6 Additional information for APPLE-SA-2022-10-24-3 macOS Monterey 12.6.1
- https://security.netapp.com/advisory/ntap-20230427-0007/
Sources
- CVE-2022-37434 · CVE Program
- CVE-2022-37434 · NVD
- FIRST EPSS
- GHSA-cfmr-vrgj-vqwv · GitHub Advisory Database · CC BY 4.0
- CVE-2022-37434 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences