{"id":"CVE-2021-3695","details":"A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.","modified":"2026-05-08T04:47:33.971410Z","published":"2022-07-06T16:15:08.210Z","related":["ALSA-2022:5095","ALSA-2022:5099","SUSE-SU-2022:2035-1","SUSE-SU-2022:2036-1","SUSE-SU-2022:2037-1","SUSE-SU-2022:2038-1","SUSE-SU-2022:2039-1","SUSE-SU-2022:2041-1","SUSE-SU-2022:2064-1","SUSE-SU-2022:2073-1","SUSE-SU-2022:2074-1","openSUSE-SU-2024:12137-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","cpe":"cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.00"},{"fixed":"2.12"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:a:redhat:openshift:3.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"3.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:a:redhat:openshift_container_platform:4.10:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"4.10"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"4.6"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:a:redhat:openshift_container_platform:4.9:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"4.9"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"36"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux:8.1:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.1"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux:8.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.4"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.2"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_eus:8.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.4"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.6"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_eus:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.2:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.2"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.4"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.6"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.2"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_aus:8.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.4"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.6"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.1:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.1"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.2:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.2"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.4"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.6"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.2"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_tus:8.4:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.4"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"8.6"}]}]},"references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202209-12"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220930-0001/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1991685"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openshift/origin","events":[{"introduced":"0"},{"last_affected":"67617dd2edc465b7f51ffcbfcc7c29c93f9fc3da"}],"database_specific":{"source":"CPE_FIELD","cpe":"cpe:2.3:a:redhat:developer_tools:1.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"1.0"}]}}],"versions":["v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-3695.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"}]}