{"id":"CVE-2026-6238","revision":null,"records":[{"revision":"f07f846e495d4ddebfb5268a340d87e6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-6238","aliases":[],"title":"Buffer overread in ns_printrrf with corrupted RDATA field","description":"The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.0.1 to version 2.43 fail to validate the RDATA content against the RDATA length in a DNS response when processing A6, CERT, LOC, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a target application to crash or read uninitialized memory.\n\nThese functions are for application debugging only and hence not in the path of code executed by the DNS resolver.  Further, they have been deprecated since version 2.34 and should not be used by any new applications.  Applications should consider porting away from these interfaces since they may be removed in future versions.","state":0,"publishedAt":"2026-04-28T16:43:08.526+00:00","modifiedAt":"2026-10-15T01:12:16.267+00:00","affected":[{"ecosystem":"Vendor product","name":"glibc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"The GNU C Library\",\n                    \"product\": \"glibc\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"2.0.1\",\n                            \"lessThanOrEqual\": \"2.43\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"defaultStatus\": \"affected\"\n                }"}],"metrics":[],"references":["https://sourceware.org/bugzilla/show_bug.cgi?id=34069","https://inbox.sourceware.org/libc-announce/7a655d55-276f-41fe-b550-feb3ebb2ce91@redhat.com/T/#u"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-6238","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-6238","identifiers":["CVE-2026-6238"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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