synced 5 MIN AGO
01 Record

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.

CriticalPUBLISHEDCNA: mitre
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
View raw JSON

02 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.

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
19.24% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 97.3% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-14.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-08-05 00:00Z4 YR AGO
Last updated
2026-10-14 17:26Z14 DAYS AGO
Reserved
2022-08-05
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
  • CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
  • CWE-787Out-of-bounds WriteBase
Data version
5.2
Document digest
4ca04c10ed06b64d31e9bd7802ea7cd69204546ae8db79ecd501a78d17064773

05 Affected products

VendorProductVersionsPlatforms
appleipadosNot specified—
appleiphone_osNot specified—
applemacosNot specified—
applewatchosNot specified—
debiandebian_linuxNot specified—
fedoraprojectfedoraNot specified—
netappactive_iq_unified_managerNot specified—
netapph300sNot specified—
netapph300s_firmwareNot specified—
netapph500sNot specified—
netapph500s_firmwareNot specified—
netapph700sNot specified—
netapph700s_firmwareNot specified—
netapphciNot specified—
netapphci_compute_nodeNot specified—
netappmanagement_services_for_element_softwareNot specified—
netapponcommand_workflow_automationNot specified—
netappontap_select_deploy_administration_utilityNot specified—
netappstoragegridNot specified—
redhatenterprise_linuxNot specified—
redhatjboss_core_servicesNot specified—
redhatquarkusNot specified—
redhatrhel_eusNot specified—
stormshieldstormshield_network_securityNot specified—
zlibzlibNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • rsync
    Fixed in 3.1.3-19.el8
  • rsync-daemon
    Fixed in 3.1.3-19.el8
  • zlib
    Fixed in 1.2.11-19.el8_6
  • zlib-devel
    Fixed in 1.2.11-19.el8_6
  • zlib-static
    Fixed in 1.2.11-19.el8_6

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • rsync
    Fixed in 3.2.3-18.el9
  • rsync-daemon
    Fixed in 3.2.3-18.el9
  • zlib
    Fixed in 1.2.11-32.el9_0
  • zlib-devel
    Fixed in 1.2.11-32.el9_0
  • zlib-static
    Fixed in 1.2.11-32.el9_0

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • zlib
    Fixed in 1:1.2.12-3

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • rsync
    Fixed in 3.1.3-19.el8
  • rsync-daemon
    Fixed in 3.1.3-19.el8
  • zlib
    Fixed in 1.2.11-19.el8_6
  • zlib-devel
    Fixed in 1.2.11-19.el8_6
  • zlib-static
    Fixed in 1.2.11-19.el8_6

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • rsync
    Fixed in 3.2.3-18.el9
  • rsync-daemon
    Fixed in 3.2.3-18.el9
  • zlib
    Fixed in 1.2.11-32.el9_0
  • zlib-devel
    Fixed in 1.2.11-32.el9_0
  • zlib-static
    Fixed in 1.2.11-32.el9_0

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • libz-mingw-w64
    Fixed in 1.2.12+dfsg-2
  • zlib
    Fixed in 1:1.2.11.dfsg-4.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • libz-mingw-w64
    Fixed in 1.2.12+dfsg-2
  • zlib
    Fixed in 1:1.2.11.dfsg-4.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • libz-mingw-w64
    Fixed in 1.2.12+dfsg-2
  • zlib
    Fixed in 1:1.2.11.dfsg-4.1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • rsync
    Fixed in 3.1.2-2.1ubuntu1.5
  • zlib
    Fixed in 1:1.2.11.dfsg-0ubuntu2.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • klibc
    Fixed in 2.0.7-1ubuntu5.2
  • rsync
    Fixed in 3.1.3-8ubuntu0.4
  • zlib
    Fixed in 1:1.2.11.dfsg-2ubuntu1.5

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • klibc
    Fixed in 2.0.10-4ubuntu0.1
  • zlib
    Fixed in 1:1.2.11.dfsg-2ubuntu9.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • klibc
    Fixed in 2.0.13-4ubuntu0.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • klibc
    Fixed in 2.0.3-0ubuntu1.14.04.3+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • zlib
    Fixed in 1:1.2.8.dfsg-1ubuntu1.1+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • klibc
    Fixed in 2.0.4-8ubuntu1.16.04.4+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • rsync
    Fixed in 3.1.1-3ubuntu1.3+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • zlib
    Fixed in 1:1.2.8.dfsg-2ubuntu4.3+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • klibc
    Fixed in 2.0.4-9ubuntu2.2+esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.