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CRITICAL

CVE-2022-37434

CVSS v3

9.8

CRITICAL

EPSS Score

19.0 %

exploit probability, as of 2026-10-18

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rsyncAlmaLinux:9all versions · fixed in 3.2.3-18.el9and 1 other package
  • rsyncAlmaLinux:8all versions · fixed in 3.1.3-19.el8and 1 other package
  • zlibAlmaLinux:9all versions · fixed in 1.2.11-32.el9_0and 2 other packages
  • zlibAlmaLinux:8all versions · fixed in 1.2.11-19.el8_6and 2 other packages

Vendor advisories

  • CVE-2022-37434 Red Hat Product Security230 products fixed · 7 known affected

    zlib: heap-based buffer over-read and overflow in inflate() in inflate.c via a large gzip header extra field

    rocksdbjni as a component of Red Hat build of Quarkus · minizip as a component of Red Hat Enterprise Linux 6 · minizip-devel as a component of Red Hat Enterprise Linux 6

  • ICSA-26-202-06 CISA1 known affected

    Siemens CADRA

    CADRA < V2511

  • SSA-470355 Siemens ProductCERT1 known affected

    SSA-470355: Zlib and Foxit Vulnerabilities in CADRA

    CADRA < V2511

  • SSA-202008 Siemens ProductCERT11 known affected

    SSA-202008: Multiple Vulnerabilities in Ruggedcom Rox Before V2.17.0

    RUGGEDCOM ROX MX5000 · RUGGEDCOM ROX MX5000RE · RUGGEDCOM ROX RX1400

  • ICSA-25-105-08 CISA2 known affected

    ABB M2M Gateway

    ABB M2M Gateway ARM600, firmware versions = 4.1.2 <= 5.0.3 · ABB M2M Gateway SW, software versions = 5.0.1 <= 5.0.3

  • RHSA-2024:0254 Red Hat Product Security14 products fixed

    Red Hat Security Advisory: rsync security update

13 more advisories

Full record on NVD

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).

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-08-05
Last Modified
2026-07-14

Frequently asked questions

What is CVE-2022-37434?

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).

Is CVE-2022-37434 actively exploited?

Active exploitation of CVE-2022-37434 has not been confirmed. Its EPSS score was 19.0% on 2026-10-18, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-37434?

CVE-2022-37434 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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