{"cve":"CVE-2022-49879","nvd":{"published":"2025-05-01T15:16:12.857","modified":"2026-06-17T05:19:24.190","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix BUG_ON() when directory entry has invalid rec_len\n\nThe rec_len field in the directory entry has to be a multiple of 4.  A\ncorrupted filesystem image can be used to hit a BUG() in\next4_rec_len_to_disk(), called from make_indexed_dir().\n\n ------------[ cut here ]------------\n kernel BUG at fs/ext4/ext4.h:2413!\n ...\n RIP: 0010:make_indexed_dir+0x53f/0x5f0\n ...\n Call Trace:\n  <TASK>\n  ? add_dirent_to_buf+0x1b2/0x200\n  ext4_add_entry+0x36e/0x480\n  ext4_add_nondir+0x2b/0xc0\n  ext4_create+0x163/0x200\n  path_openat+0x635/0xe90\n  do_filp_open+0xb4/0x160\n  ? __create_object.isra.0+0x1de/0x3b0\n  ? _raw_spin_unlock+0x12/0x30\n  do_sys_openat2+0x91/0x150\n  __x64_sys_open+0x6c/0xa0\n  do_syscall_64+0x3c/0x80\n  entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe fix simply adds a call to ext4_check_dir_entry() to validate the\ndirectory entry, returning -EFSCORRUPTED if the entry is invalid.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-617"],"references":["https://git.kernel.org/stable/c/156451a67b93986fb07c274ef6995ff40766c5ad","https://git.kernel.org/stable/c/17a0bc9bd697f75cfdf9b378d5eb2d7409c91340","https://git.kernel.org/stable/c/2fa24d0274fbf913b56ee31f15bc01168669d909","https://git.kernel.org/stable/c/999cff2b6ce3b45c08abf793bf55534777421327","https://git.kernel.org/stable/c/ce1ee2c8827fb6493e91acbd50f664cf2a972c3d"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:22.920403922+00:00"},"epss":{"cve":"CVE-2022-49879","score":0.00218,"percentile":0.12349,"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."]}