Most recent entries from all https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 28 Sep 2026 19:04:17 +0000 CVE-2026-4437 — gethostbyaddr and gethostbyaddr_r may incorrectly handle DNS response https://vulnerability.circl.lu/vuln/cve-2026-4437 <p><strong>Affected:</strong> The GNU C Library glibc, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP</p> <p>Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library&#39;s DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.</p> <p><strong>Affected:</strong> The GNU C Library glibc, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP</p> <p>Calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library&#39;s DNS backend in the GNU C Library version 2.34 to version 2.43 could, with a crafted response from the configured DNS server, result in a violation of the DNS specification that causes the application to treat a non-answer section of the DNS response as a valid answer.</p> https://vulnerability.circl.lu/vuln/cve-2026-4437