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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 19.2%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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).
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 19.24% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787, CWE-120
- Affected
- zlib/zlib · fedoraproject/fedora · debian/debian linux · netapp/active iq unified manager · netapp/hci · netapp/management services for element software · netapp/oncommand workflow automation · netapp/ontap select deploy administration utility · netapp/storagegrid · netapp/hci compute node · netapp/h300s firmware · netapp/h500s firmware · netapp/h700s firmware · apple/ipados · apple/iphone os · apple/macos · apple/watchos · stormshield/stormshield network security
- Source
- cve@mitre.org
EPSS moved from 19.0% on 29 September 2026 to 19.2% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://seclists.org/fulldisclosure/2022/Oct/37Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/38Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/41Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/42Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/08/05/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/08/09/1Mailing List, Patch, Third Party Advisory
- https://github.com/curl/curl/issues/9271Exploit, Issue Tracking, Third Party Advisory
- https://github.com/ivd38/zlib_overflowExploit, Third Party Advisory
- https://github.com/madler/zlib/blob/21767c654d31d2dccdde4330529775c6c5fd5389/zlib.h#L1062-L1063Exploit, Third Party Advisory
- https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d
- https://github.com/madler/zlib/commit/eff308af425b67093bab25f80f1ae950166bece1Patch, Third Party Advisory
- https://github.com/nodejs/node/blob/75b68c6e4db515f76df73af476eccf382bbcb00a/deps/zlib/inflate.c#L762-L764Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00012.htmlMailing 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/HT213488Third Party Advisory
- https://support.apple.com/kb/HT213489Third Party Advisory
- https://support.apple.com/kb/HT213490Third Party Advisory
- https://support.apple.com/kb/HT213491Third Party Advisory
- https://support.apple.com/kb/HT213493Third Party Advisory
- https://support.apple.com/kb/HT213494Third Party Advisory
- https://www.debian.org/security/2022/dsa-5218Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/37Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/38Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2022/Oct/41Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.