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        "cveId": "CVE-2026-8674",
        "assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18",
        "state": "PUBLISHED",
        "assignerShortName": "glibc",
        "dateReserved": "2026-05-15T12:15:59.229Z",
        "datePublished": "2026-09-17T16:54:27.310Z",
        "dateUpdated": "2026-09-17T18:09:16.072Z"
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            "title": "Assertion failure in the DNS stub resolver with a long search domain",
            "datePublic": "2023-11-07T05:00:00.000Z",
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                            "cweId": "CWE-617",
                            "description": "CWE-617 Reachable Assertion",
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                    "product": "glibc",
                    "versions": [
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                            "version": "2.26",
                            "lessThanOrEqual": "2.44",
                            "versionType": "custom"
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                    "lang": "en",
                    "value": "Initializing the DNS stub resolver from an /etc/resolv.conf file, or a LOCALDOMAIN environment variable, whose search list contains a domain of roughly 200 characters or more in the GNU C Library version 2.26 to 2.44 results in an assertion failure which aborts the process.\n\nThe resolver truncates the search list when copying it into the fixed-size _res.defdname buffer, then asserts that the copy is consistent with the full configuration.  The consistency check compared against the wrong size and did not handle a first entry that does not fit, so a correctly truncated list failed the assertion.  Any process that resolves names through the library is affected, including long-running processes that reload /etc/resolv.conf on the next query after it changes.  Search domains are commonly written to /etc/resolv.conf from data received over DHCP or from a VPN server, so an attacker on the local network may be able to trigger this without privileges on the target system, subject to validation by the network configuration software.",
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                            "value": "Initializing the DNS stub resolver from an /etc/resolv.conf file, or a LOCALDOMAIN environment variable, whose search list contains a domain of roughly 200 characters or more in the GNU C Library version 2.26 to 2.44 results in an assertion failure which aborts the process.<br><br>The resolver truncates the search list when copying it into the fixed-size _res.defdname buffer, then asserts that the copy is consistent with the full configuration.  The consistency check compared against the wrong size and did not handle a first entry that does not fit, so a correctly truncated list failed the assertion.  Any process that resolves names through the library is affected, including long-running processes that reload /etc/resolv.conf on the next query after it changes.  Search domains are commonly written to /etc/resolv.conf from data received over DHCP or from a VPN server, so an attacker on the local network may be able to trigger this without privileges on the target system, subject to validation by the network configuration software."
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                {
                    "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=31026",
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                {
                    "url": "https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0021",
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                    "url": "https://sourceware.org/git/?p=glibc.git;a=commit;h=506ea57086bfb9ce3daff1c14246a1cb532aba0a",
                    "tags": [
                        "patch"
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                    "url": "https://joshua.hu/fuzzing-glibc-libresolv",
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                        "attackVector": "ADJACENT_NETWORK",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "NONE",
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