{"id":"CVE-2025-70099","aliases":["EUVD-2025-210028","GHSA-vgqp-ggfv-3xf6"],"status":"published","title":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of...","description":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00384,"percentile":0.32834,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-476"],"published":"2026-06-01T00:00:00Z","modified":"2026-07-22T08:10:00Z","references":[{"url":"https://github.com/gkostka/lwext4/issues/89","tags":["exploit"]},{"url":"https://github.com/sigdevel/pocs/blob/main/res/lwext4/1/sig11_2_1_lwext4_ext4_dir_h_126"},{"url":"https://infosec.exchange/@sigdevel/116668939725424227"},{"url":"http://www.openwall.com/lists/oss-security/2026/06/29/4"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-70099"},{"url":"https://github.com/advisories/GHSA-vgqp-ggfv-3xf6"}],"sources":{"cve":[{"id":"CVE-2025-70099","description":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).","status":"published","published":"2026-06-01T00:00:00Z","modified":"2026-06-29T19:34:43.285Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:32:25.186422Z"}],"euvd":[{"id":"EUVD-2025-210028","description":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).","status":"published","published":"2026-06-01T00:00:00Z","modified":"2026-06-29T19:34:43Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:20:22.124605Z"}],"ghsa":[{"id":"GHSA-vgqp-ggfv-3xf6","title":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of...","description":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).","status":"published","published":"2026-06-01T21:30:44Z","modified":"2026-06-29T21:32:59Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:09:04.017394Z"}],"nvd":[{"id":"CVE-2025-70099","description":"A NULL pointer dereference in the ext4_dir_en_get_name_len function in include/ext4_dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name_len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).","status":"published","published":"2026-06-01T21:16:24.187Z","modified":"2026-07-22T08:10:00.117Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:02.090779Z"}]}}