CVE-2015-1781: Canonical Ubuntu Linux

Medium severity, CVSS 6.8. EPSS: 5% chance of exploitation in the next 30 days.

Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.04 only
• Debian Debian Linux: version 7.0 only
• GNU Glibc: up to and including 2.21
• Suse Linux Enterprise Debuginfo: version 11 only
• Suse Linux Enterprise Desktop: version 11 only
• Suse Linux Enterprise Server: version 11 only

Published 2015-09-28. Last modified 2026-06-17.