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        "cveId": "CVE-2026-89092",
        "assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
        "state": "PUBLISHED",
        "assignerShortName": "glibc",
        "dateReserved": "2026-09-10T20:18:09.584Z",
        "datePublished": "2026-09-11T01:23:01.162Z",
        "dateUpdated": "2026-09-11T17:02:18.288Z"
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                "dateUpdated": "2026-09-11T01:23:01.162Z"
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            "title": "Stack overflow in nscd due to unbounded alloca use",
            "problemTypes": [
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                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-789",
                            "description": "CWE-789 Memory allocation with excessive size value",
                            "type": "CWE"
                        }
                    ]
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            ],
            "impacts": [
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                    "capecId": "CAPEC-142",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-142 DNS Cache Poisoning"
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            ],
            "affected": [
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                    "vendor": "The GNU C Library",
                    "product": "glibc",
                    "versions": [
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                            "version": "2.3.4",
                            "lessThan": "2.45",
                            "versionType": "custom"
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                    "lang": "en",
                    "value": "The nscd service in the GNU C Library 2.3.4 onwards may crash due to a \nstack overflow when a malicious DNS server returns too large a response \nfor a DNS query, resulting in degraded DNS resolution for the system.\n\n\n\nExploitation of this bug needs a system that has nscd enabled and using \nan untrusted DNS server for name resolution, with the compromised DNS \nserver being capable of processing records large enough to result in a \nstack overflow in an nscd thread stack.  During experimentation, bind 9 \nwas unable to handle large records, but that could change in future or \nwith a different name server.  In typical installations, nscd is \nexecuted in an isolated context as its own user without a shell, due to \nwhich any compromise of that service is isolated.\n\n\n\nThere is a remote possibility of nscd cache corruption if an attacker \nmanages to get the stack pointer into a desired point in the heap, \npotentially resulting in other caches in nscd being overwritten with \ncorrupt data through the stack overflow, until the buggy code path \neventually results in a crash.\n\n\n\nFinally, a crash in nscd may result in performance degradation when \nresolving names, but it does not result in a denial of service.",
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                            "value": "The nscd service in the GNU C Library 2.3.4 onwards may crash due to a \nstack overflow when a malicious DNS server returns too large a response \nfor a DNS query, resulting in degraded DNS resolution for the system.\n<br>\n<br>Exploitation of this bug needs a system that has nscd enabled and using \nan untrusted DNS server for name resolution, with the compromised DNS \nserver being capable of processing records large enough to result in a \nstack overflow in an nscd thread stack.&nbsp; During experimentation, bind 9 \nwas unable to handle large records, but that could change in future or \nwith a different name server.&nbsp; In typical installations, nscd is \nexecuted in an isolated context as its own user without a shell, due to \nwhich any compromise of that service is isolated.\n<br>\n<br>There is a remote possibility of nscd cache corruption if an attacker \nmanages to get the stack pointer into a desired point in the heap, \npotentially resulting in other caches in nscd being overwritten with \ncorrupt data through the stack overflow, until the buggy code path \neventually results in a crash.\n<br>\n<br>Finally, a crash in nscd may result in performance degradation when \nresolving names, but it does not result in a denial of service.&nbsp;"
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            "references": [
                {
                    "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=34624",
                    "tags": [
                        "issue-tracking"
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                },
                {
                    "url": "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0016",
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                        "attackVector": "ADJACENT_NETWORK",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "LOW",
                        "availabilityImpact": "LOW",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 4.2,
                        "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"
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            "credits": [
                {
                    "lang": "en",
                    "value": "Anmol Singh Rajput",
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            "source": {
                "discovery": "UNKNOWN"
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                        "url": "http://www.openwall.com/lists/oss-security/2026/09/11/2"
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                                "timestamp": "2026-09-11T16:57:22.665457Z",
                                "id": "CVE-2026-89092",
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