{"id":"CVE-2022-49879","summary":"ext4: fix BUG_ON() when directory entry has invalid rec_len","details":"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  \u003cTASK\u003e\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.","modified":"2026-04-11T12:44:38.772837Z","published":"2025-05-01T14:10:27.117Z","related":["SUSE-SU-2025:01918-1","SUSE-SU-2025:01966-1","SUSE-SU-2025:01982-1","SUSE-SU-2025:01995-1","SUSE-SU-2025:02173-1","SUSE-SU-2025:02262-1","SUSE-SU-2025:02334-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49879.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/156451a67b93986fb07c274ef6995ff40766c5ad"},{"type":"WEB","url":"https://git.kernel.org/stable/c/17a0bc9bd697f75cfdf9b378d5eb2d7409c91340"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2fa24d0274fbf913b56ee31f15bc01168669d909"},{"type":"WEB","url":"https://git.kernel.org/stable/c/999cff2b6ce3b45c08abf793bf55534777421327"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ce1ee2c8827fb6493e91acbd50f664cf2a972c3d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49879.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49879"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3d0518f4758eca4339e75e5b9dbb7e06a5ce08b4"},{"fixed":"2fa24d0274fbf913b56ee31f15bc01168669d909"},{"fixed":"156451a67b93986fb07c274ef6995ff40766c5ad"},{"fixed":"999cff2b6ce3b45c08abf793bf55534777421327"},{"fixed":"ce1ee2c8827fb6493e91acbd50f664cf2a972c3d"},{"fixed":"17a0bc9bd697f75cfdf9b378d5eb2d7409c91340"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49879.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.30"},{"fixed":"5.4.224"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.154"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49879.json"}}],"schema_version":"1.7.5"}