{"schema_version":"1.7.2","id":"OESA-2026-1802","modified":"2026-08-06T11:10:49Z","published":"2026-04-03T11:10:49Z","upstream":["CVE-2026-4437","CVE-2026-4438"],"summary":"glibc security update","details":"The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt,  login, exit and more.\r\n\r\nSecurity Fix(es):\n\nCalling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library'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.(CVE-2026-4437)\n\nCalling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C library version 2.34 to version 2.43 could result in an invalid DNS hostname being returned to the caller in violation of the DNS specification.(CVE-2026-4438)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS","name":"glibc","purl":"pkg:rpm/openEuler/glibc&distro=openEuler-24.03-LTS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.38-98.oe2403"}]}],"ecosystem_specific":{"aarch64":["glibc-2.38-98.oe2403.aarch64.rpm","glibc-all-langpacks-2.38-98.oe2403.aarch64.rpm","glibc-common-2.38-98.oe2403.aarch64.rpm","glibc-debuginfo-2.38-98.oe2403.aarch64.rpm","glibc-debugsource-2.38-98.oe2403.aarch64.rpm","glibc-debugutils-2.38-98.oe2403.aarch64.rpm","glibc-devel-2.38-98.oe2403.aarch64.rpm","glibc-locale-archive-2.38-98.oe2403.aarch64.rpm","glibc-locale-source-2.38-98.oe2403.aarch64.rpm","glibc-nss-devel-2.38-98.oe2403.aarch64.rpm","libnsl-2.38-98.oe2403.aarch64.rpm","nscd-2.38-98.oe2403.aarch64.rpm","nss_modules-2.38-98.oe2403.aarch64.rpm"],"noarch":["glibc-help-2.38-98.oe2403.noarch.rpm"],"src":["glibc-2.38-98.oe2403.src.rpm"],"x86_64":["glibc-2.38-98.oe2403.x86_64.rpm","glibc-all-langpacks-2.38-98.oe2403.x86_64.rpm","glibc-common-2.38-98.oe2403.x86_64.rpm","glibc-debuginfo-2.38-98.oe2403.x86_64.rpm","glibc-debugsource-2.38-98.oe2403.x86_64.rpm","glibc-debugutils-2.38-98.oe2403.x86_64.rpm","glibc-devel-2.38-98.oe2403.x86_64.rpm","glibc-locale-archive-2.38-98.oe2403.x86_64.rpm","glibc-locale-source-2.38-98.oe2403.x86_64.rpm","glibc-nss-devel-2.38-98.oe2403.x86_64.rpm","libnsl-2.38-98.oe2403.x86_64.rpm","nscd-2.38-98.oe2403.x86_64.rpm","nss_modules-2.38-98.oe2403.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1802"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4437"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4438"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"database_specific":{"severity":"High"}}