{"id":"CVE-2021-28855","aliases":["EUVD-2021-15509","GHSA-648v-392v-p884"],"status":"published","title":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the...","description":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00895,"percentile":0.59813,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2021-04-14T16:11:11Z","modified":"2026-10-20T14:20:31Z","products":[{"vendor":"entropymine","product":"deark"}],"references":[{"url":"https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark/","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/jsummers/deark/commit/287f5ac31dfdc074669182f51ece637706070eeb","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/fuzzing2026/CVE-PoCs/tree/main/deark-CVE-2021-28855","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-28855"},{"url":"https://fatihhcelik.github.io/posts/NULL-Pointer-Dereference-Deark"},{"url":"https://github.com/advisories/GHSA-648v-392v-p884"}],"sources":{"cve":[{"id":"CVE-2021-28855","description":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).","status":"published","published":"2021-04-14T16:11:11Z","modified":"2026-01-26T16:23:52.247Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-15509","description":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).","status":"published","published":"2021-04-14T16:11:11Z","modified":"2026-01-26T16:23:52Z","updated_at":"2026-11-02T19:48:47.293439Z"}],"ghsa":[{"id":"GHSA-648v-392v-p884","title":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the...","description":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).","status":"published","published":"2022-05-24T17:47:38Z","modified":"2026-01-26T18:32:27Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:05:54.711562Z"}],"nvd":[{"id":"CVE-2021-28855","description":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).","status":"published","published":"2021-04-14T17:15:14.363Z","modified":"2026-06-17T03:46:59.4Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:52.03307Z"}],"osv":[{"id":"CVE-2021-28855","description":"In Deark before 1.5.8, a specially crafted input file can cause a NULL pointer dereference in the dbuf_write function (src/deark-dbuf.c).","status":"published","published":"2021-04-14T17:15:14.363Z","modified":"2026-10-20T14:20:31.384200768Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"}]}}