{"id":"CVE-2026-93095","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: validate thread record before delete key rebuild\n\nhfsplus_delete_cat() is called with str == NULL when the last open\nreference to an unlinked HFS+ hardlink bac…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: validate thread record before delete key rebuild\n\nhfsplus_delete_cat() is called with str == NULL when the last open\nreference to an unlinked HFS+ hardlink bac…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 33cda0036bc683fc888c20b04a5fc030e3e8413b","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b9729c51a8b67f8b20b8a8cf395da4be63a0c15b","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < af48abc1b00d865c3f4c4d76b901c44115cb7162","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e20f3b749ad241df77ec1c3e13a9c22209aa1eb3","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7898beee166c1145c0bca364d687b8437435bf1a","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e31985c67ba00a59d9b1340af473c1dbe6c87856","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 473ea7aa35615829f0de7a71e8691d69dc24e328","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20","Linux 2.6.12"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:18:20.477","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93095","references":[{"url":"https://git.kernel.org/stable/c/33cda0036bc683fc888c20b04a5fc030e3e8413b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/473ea7aa35615829f0de7a71e8691d69dc24e328","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7898beee166c1145c0bca364d687b8437435bf1a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/af48abc1b00d865c3f4c4d76b901c44115cb7162","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b9729c51a8b67f8b20b8a8cf395da4be63a0c15b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e20f3b749ad241df77ec1c3e13a9c22209aa1eb3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2ea5cac61acfc11dad22f1d2d4bc71d56c52a20","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e31985c67ba00a59d9b1340af473c1dbe6c87856","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00129,"epssPercentile":0.0294,"ingestedAt":"2026-09-17T16:21:47.758Z","slug":"CVE-2026-93095","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: validate thread record before delete key rebuild\n\nhfsplus_delete_cat() is called with str == NULL when the last open\nreference to an unlinked HFS+ hardlink backing inode is closed. In that\ncase, the function finds the catalog thread by CNID and rebuilds the\ncatalog key from thread.nodeName.\n\nThat reconstruction path reads thread.nodeName.length directly from the\ncatalog B-tree into fd.search_key and then copies length * 2 bytes into\nfd.search_key->cat.name.unicode. It does not first check that the found\nrecord is a thread record or that its size matches the thread name.\n\nA corrupted image can therefore provide an oversized thread name length\nand make hfs_bnode_read() write past the catalog search-key allocation.\n\nRead the CNID record through hfsplus_brec_read_cat(), which bounds the\nrecord read to sizeof(hfsplus_cat_entry) and verifies that a thread\nrecord's size exactly matches nodeName.length. Together, these checks\nensure an accepted thread name fits HFSPLUS_MAX_STRLEN. Reject non-thread\nrecords before building the delete key from the validated thread name.\n\nShare the thread-record-type helper between hfsplus_find_cat() and\nhfsplus_delete_cat().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207369,"id":"CVE-2026-93095","ts":1789757341500,"field":"cvss","old":null,"new":"7.8"},{"seq":207368,"id":"CVE-2026-93095","ts":1789757341500,"field":"severity","old":"none","new":"high"}]}