CVE-2016-9843

critical

Published 2017-05-23 · Modified 2026-05-13

CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

7.5

VIR risk

9.8

Description

The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-9843

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-9843.html

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	8.0	affected
ubuntu	16.04	affected
ubuntu	18.04	affected
macos		affected	`11`
suse	42.1	affected
suse	42.2	affected
suse	13.2	affected
rhel	6.0	affected
rhel	7.0	affected
rhel	7.4	affected
rhel	7.5	affected
debian	bookworm	fixed	`3.1.3-6`
debian	bullseye	fixed	`3.1.3-6`
debian	forky	fixed	`3.1.3-6`
debian	sid	fixed	`3.1.3-6`
debian	trixie	fixed	`3.1.3-6`

Application impact

Vendor	Product	Versions	Fixed
zlib	zlib	`{"startIncluding":"1.2.0","endExcluding":"1.2.9"}`	`1.2.9`
oracle	database_server	`18c`
oracle	jdk	`1.6.0`
oracle	jdk	`1.7.0`
oracle	jdk	`1.8.0`
oracle	jre	`1.6.0`
oracle	jre	`1.7.0`
oracle	jre	`1.8.0`
oracle	mysql	`{"startIncluding":"5.5.0","endIncluding":"5.5.61"}`
redhat	satellite	`5.8`
netapp	active_iq_unified_manager	`{"startIncluding":"7.3"}`
netapp	oncommand_insight	`-`
netapp	oncommand_workflow_automation	`-`
netapp	snapcenter	`-`
mariadb	mariadb	`{"startIncluding":"5.5.0","endExcluding":"5.5.62"}`	`5.5.62`
nodejs	node.js	`{"startIncluding":"4.0.0","endIncluding":"4.1.2"}`

References

Verify integrity in audit chain (admin only). AS-IS.