USN-4246-1: zlib Ubuntu

Published

Published 22-01-2020Last modified 27-04-2026

Vulnerability summary

USN-4246-1 is a vulnerability in zlib Ubuntu with no CVSS score yet.

Priority

Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

Not scored

010

No CVSS score recorded

EPSS scoreNot scoredRisk metrics not yet published.

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 4 · Downstream 0 · Related 4

CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843

Timeline

22-01-2020
PublishedVulnerability first disclosed.
27-04-2026
Last modifiedVulnerability information updated.

Description

zlib vulnerabilities It was discovered that zlib incorrectly handled pointer arithmetic. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841) It was discovered that zlib incorrectly handled vectors involving left shifts of negative integers. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9842) It was discovered that zlib incorrectly handled vectors involving big-endian CRC calculation. An attacker could use this issue to cause zlib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-9843)