{"id":"MGASA-2026-0581","summary":"Updated glibc package fixes security vulnerabilities","details":"Passing an effectively empty string to the `,ccs=` syntax extension of\nthe mode argument in the `fopen` function in the GNU C Library version\n2.45 or earlier may result in a heap buffer overflow when the mode\nstring input to the function is attacker controlled. This usage pattern\nis not seen in applications in common GNU/Linux distributions and\napplications that process user-supplied values for `ccs` should not pass\nthem through without validation. (CVE-2026-18374)\nStack overflow in nscd due to unbounded alloca use. (CVE-2026-89092)\nAssertion failure in the DNS stub resolver with a long search domain.\n(CVE-2026-8674)\nAT_SECURE programs may load attacker-controlled code via $ORIGIN.\n(CVE-2026-86805)\nAT_SECURE program buffer overflow via $ORIGIN processing.\n(CVE-2026-95818)\nDirectory traversal via the LANGUAGE environment variable.\n(CVE-2026-84243)\n","modified":"2026-11-09T16:58:23.946376546Z","published":"2026-11-09T16:32:57Z","upstream":["CVE-2026-18374","CVE-2026-84243","CVE-2026-8674","CVE-2026-86805","CVE-2026-89092","CVE-2026-95818"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2026-0581.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=36255"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/08/27/6"},{"type":"WEB","url":"https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0015"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/09/11/2"},{"type":"REPORT","url":"https://sourceware.org/bugzilla/show_bug.cgi?id=34624"},{"type":"WEB","url":"https://sourceware.org/git/?p=glibc.git;a=blob;f=advisories/GLIBC-SA-2026-0016"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/09/17/4"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/09/22/20"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/10/30/17"}],"affected":[{"package":{"name":"glibc","ecosystem":"Mageia:10","purl":"pkg:rpm/mageia/glibc?arch=source&distro=mageia-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.42-11.mga10"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2026-0581.json"}}],"schema_version":"1.9.2","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}