{"cve":"CVE-2022-50673","nvd":{"published":"2025-12-09T16:17:19.473","modified":"2026-08-04T10:18:21.107","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix use-after-free in ext4_orphan_cleanup\n\nI caught a issue as follows:\n==================================================================\n BUG: KASAN: use-after-free in __list_add_valid+0x28/0x1a0\n Read of size 8 at addr ffff88814b13f378 by task mount/710\n\n CPU: 1 PID: 710 Comm: mount Not tainted 6.1.0-rc3-next #370\n Call Trace:\n  <TASK>\n  dump_stack_lvl+0x73/0x9f\n  print_report+0x25d/0x759\n  kasan_report+0xc0/0x120\n  __asan_load8+0x99/0x140\n  __list_add_valid+0x28/0x1a0\n  ext4_orphan_cleanup+0x564/0x9d0 [ext4]\n  __ext4_fill_super+0x48e2/0x5300 [ext4]\n  ext4_fill_super+0x19f/0x3a0 [ext4]\n  get_tree_bdev+0x27b/0x450\n  ext4_get_tree+0x19/0x30 [ext4]\n  vfs_get_tree+0x49/0x150\n  path_mount+0xaae/0x1350\n  do_mount+0xe2/0x110\n  __x64_sys_mount+0xf0/0x190\n  do_syscall_64+0x35/0x80\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n  </TASK>\n [...]\n==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\next4_fill_super\n  ext4_orphan_cleanup\n   --- loop1: assume last_orphan is 12 ---\n    list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan)\n    ext4_truncate --> return 0\n      ext4_inode_attach_jinode --> return -ENOMEM\n    iput(inode) --> free inode<12>\n   --- loop2: last_orphan is still 12 ---\n    list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);\n    // use inode<12> and trigger UAF\n\nTo solve this issue, we need to propagate the return value of\next4_inode_attach_jinode() appropriately.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/026a4490b5381229a30f23d073b58e8e35ee6858","https://git.kernel.org/stable/c/7223d5e75f26352354ea2c0ccf8b579821b52adf","https://git.kernel.org/stable/c/7908b8a541b1578cc61b4da7f19b604a931441da","https://git.kernel.org/stable/c/7f801a1593cb957f73659732836b2dafbdfc7709","https://git.kernel.org/stable/c/a71248b1accb2b42e4980afef4fa4a27fa0e36f5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2022-50673","score":0.00209,"percentile":0.1101,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}