{"id":"CURL-CVE-2016-8619","summary":"double free in krb5 code","details":"In curl's implementation of the Kerberos authentication mechanism, the\nfunction `read_data()` in security.c is used to fill the necessary krb5\nstructures. When reading one of the length fields from the socket, it fails to\nensure that the length parameter passed to realloc() is not set to 0.\n\nThis would lead to realloc() getting called with a zero size and when doing so\nrealloc() returns NULL *and* frees the memory - in contrary to normal\nrealloc() fails where it only returns NULL - causing libcurl to free the\nmemory *again* in the error path.\n\nThis flaw could be triggered by a malicious or otherwise ill-behaving server.","aliases":["CVE-2016-8619"],"modified":"2026-05-29T05:40:54.070046Z","published":"2016-11-02T08:00:00Z","database_specific":{"www":"https://curl.se/docs/CVE-2016-8619.html","CWE":{"desc":"Double Free","id":"CWE-415"},"URL":"https://curl.se/docs/CVE-2016-8619.json","affects":"both","last_affected":"7.50.3","package":"curl","severity":"High"},"affected":[{"ranges":[{"type":"SEMVER","events":[{"introduced":"7.3"},{"fixed":"7.51.0"}]},{"type":"GIT","repo":"https://github.com/curl/curl.git","events":[{"introduced":"def69c30879c0246bccb02d79e06b937e39d0ba4"},{"fixed":"3d6460edeee21d7d790ec570d0887bed1f4366dd"}]}],"versions":["7.50.3","7.50.2","7.50.1","7.50.0","7.49.1","7.49.0","7.48.0","7.47.1","7.47.0","7.46.0","7.45.0","7.44.0","7.43.0","7.42.1","7.42.0","7.41.0","7.40.0","7.39.0","7.38.0","7.37.1","7.37.0","7.36.0","7.35.0","7.34.0","7.33.0","7.32.0","7.31.0","7.30.0","7.29.0","7.28.1","7.28.0","7.27.0","7.26.0","7.25.0","7.24.0","7.23.1","7.23.0","7.22.0","7.21.7","7.21.6","7.21.5","7.21.4","7.21.3","7.21.2","7.21.1","7.21.0","7.20.1","7.20.0","7.19.7","7.19.6","7.19.5","7.19.4","7.19.3","7.19.2","7.19.1","7.19.0","7.18.2","7.18.1","7.18.0","7.17.1","7.17.0","7.16.4","7.16.3","7.16.2","7.16.1","7.16.0","7.15.5","7.15.4","7.15.3","7.15.2","7.15.1","7.15.0","7.14.1","7.14.0","7.13.2","7.13.1","7.13.0","7.12.3","7.12.2","7.12.1","7.12.0","7.11.2","7.11.1","7.11.0","7.10.8","7.10.7","7.10.6","7.10.5","7.10.4","7.10.3","7.10.2","7.10.1","7.10","7.9.8","7.9.7","7.9.6","7.9.5","7.9.4","7.9.3","7.9.2","7.9.1","7.9","7.8.1","7.8","7.7.3","7.7.2","7.7.1","7.7","7.6.1","7.6","7.5.2","7.5.1","7.5","7.4.2","7.4.1","7.4","7.3","curl-7_50_3","curl-7_50_2","curl-7_50_1","curl-7_50_0","curl-7_49_1","curl-7_49_0","curl-7_48_0","curl-7_47_1","curl-7_47_0","curl-7_46_0","curl-7_45_0","curl-7_44_0","curl-7_43_0","curl-7_42_1","curl-7_42_0","curl-7_41_0","curl-7_40_0","curl-7_39_0","curl-7_38_0","curl-7_37_1","curl-7_37_0","curl-7_36_0","curl-7_35_0","curl-7_34_0","curl-7_33_0","curl-7_32_0","curl-7_31_0","curl-7_30_0","curl-7_29_0","curl-7_28_1","curl-7_28_0","curl-7_27_0","curl-7_26_0","curl-7_25_0","curl-7_24_0","curl-7_23_1","curl-7_23_0","curl-7_22_0","curl-7_21_7","curl-7_21_6","curl-7_21_5","curl-7_21_4","curl-7_21_3","curl-7_21_2","curl-7_21_1","curl-7_21_0","curl-7_20_1","curl-7_20_0","curl-7_19_7","curl-7_19_6","curl-7_19_5","curl-7_19_4","curl-7_19_3","curl-7_19_2","curl-7_19_1","curl-7_19_0","curl-7_18_2","curl-7_18_1","curl-7_18_0","curl-7_17_1","curl-7_17_0","curl-7_17_0-preldapfix","curl-7_16_4","curl-7_16_3","curl-7_16_2","curl-7_16_1","curl-7_16_0","curl-7_15_6-prepipeline","curl-7_15_5","curl-7_15_4","curl-7_15_3","curl-7_15_2","curl-7_15_1","curl-7_15_0","curl-7_14_1","curl-7_14_0","curl-7_13_2","curl-7_13_1","before_ftp_statemachine","curl-7_13_0","curl-7_12_3","curl-7_12_2","curl-7_12_1","curl-7_12_0","curl-7_11_2","curl-7_11_1","curl-7_11_0","curl-7_10_8","curl-7_10_7","curl-7_10_6","curl-7_10_5","curl-7_10_4","curl-7_10_3","curl-7_10_2","curl-7_10_1","curl-7_10","curl-7_9_8","curl-7_9_7","curl-7_9_7-pre2","curl-7_9_6","curl-7_9_5","curl-7_9_5-pre4","curl-7_9_5-pre2","curl-7_9_4","curl-7_9_3","curl-7_9_3-pre3","curl-7_9_3-pre2","curl-7_9_3-pre1","curl-7_9_2","curl-7_9_1","curl-7_9","before_urldata_rename","curl-7_8_1","curl-7_8_1-pre3","curl-7_8","curl-7_8-pre2","curl-7_7_3","curl-7_7_2","curl-7_7_1","curl-7_7","curl-7_7-beta5","curl-7_7-beta3","curl-7_7-beta2","curl-7_7-beta1","curl-7_7_alpha2","curl-7_6_1","curl-7_6_1-pre3","curl-7_6_1-pre2","curl-7_6_1-pre1","curl-7_6","curl-7_6-pre4","curl_7_6-pre3","curl-7_5_2","curl-7_5","curl-7_4_1","curl-7_3"],"database_specific":{"source":"https://curl.se/docs/CURL-CVE-2016-8619.json","vanir_signatures_modified":"2026-05-29T05:40:54Z","vanir_signatures":[{"target":{"file":"lib/security.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["69876899193120025980619404752203106758","105464226463918177475810286712361684742","216287641845833800772199404639865579342","320816391842693179551630593835666983911","29260199323189043931958394750686272400","185170358244307716716958314439515885161","128873655691701504350011027769561314425","231562381625869764202844943972892274129","36467259855339397374507378998927828667","319295444481991076226686737825135782858"]},"id":"CURL-CVE-2016-8619-5abfceb1","signature_type":"Line","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/3d6460edeee21d7d790ec570d0887bed1f4366dd"},{"digest":{"function_hash":"117825840141924449848413241010101018922","length":550},"id":"CURL-CVE-2016-8619-64d46b08","signature_type":"Function","signature_version":"v1","source":"https://github.com/curl/curl.git/commit/3d6460edeee21d7d790ec570d0887bed1f4366dd","target":{"file":"lib/security.c","function":"read_data"},"deprecated":false}]}}],"schema_version":"1.7.5","credits":[{"name":"Cure53","type":"FINDER"},{"name":"Daniel 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