{"id":"UBUNTU-CVE-2026-111273","details":"unarr through 1.1.1 contains an off-by-one heap-based buffer overflow in tar_get_name() in tar/parse-tar.c, reachable through the ar_entry_get_name() API. Attackers can supply a crafted TAR archive with a full ustar prefix and name to write a NUL byte past the allocation, corrupting heap memory and crashing the process.","modified":"2026-10-17T12:58:04.153885975Z","published":"2026-10-16T00:00:00Z","upstream":["CVE-2026-111273"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-111273"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-111273"},{"type":"REPORT","url":"https://github.com/selmf/unarr"},{"type":"REPORT","url":"https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254"},{"type":"REPORT","url":"https://hackmd.io/@haind-pwn/unarr-tar-zip-oob"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/unarr-through-1.1.1-off-by-one-heap-buffer-overflow-via-tar-get-name"}],"affected":[{"package":{"name":"unarr","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/unarr?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libunarr1","binary_version":"1.0.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111273.json"}},{"package":{"name":"unarr","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/unarr?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libunarr1","binary_version":"1.0.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111273.json"}},{"package":{"name":"unarr","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/unarr?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.1-1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libunarr1","binary_version":"1.0.1-1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111273.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}