{"id":"DEBIAN-CVE-2022-50546","details":"In the Linux kernel, the following vulnerability has been resolved:  ext4: fix uninititialized value in 'ext4_evict_inode'  Syzbot found the following issue: ===================================================== BUG: KMSAN: uninit-value in ext4_evict_inode+0xdd/0x26b0 fs/ext4/inode.c:180  ext4_evict_inode+0xdd/0x26b0 fs/ext4/inode.c:180  evict+0x365/0x9a0 fs/inode.c:664  iput_final fs/inode.c:1747 [inline]  iput+0x985/0xdd0 fs/inode.c:1773  __ext4_new_inode+0xe54/0x7ec0 fs/ext4/ialloc.c:1361  ext4_mknod+0x376/0x840 fs/ext4/namei.c:2844  vfs_mknod+0x79d/0x830 fs/namei.c:3914  do_mknodat+0x47d/0xaa0  __do_sys_mknodat fs/namei.c:3992 [inline]  __se_sys_mknodat fs/namei.c:3989 [inline]  __ia32_sys_mknodat+0xeb/0x150 fs/namei.c:3989  do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]  __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178  do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203  do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246  entry_SYSENTER_compat_after_hwframe+0x70/0x82  Uninit was created at:  __alloc_pages+0x9f1/0xe80 mm/page_alloc.c:5578  alloc_pages+0xaae/0xd80 mm/mempolicy.c:2285  alloc_slab_page mm/slub.c:1794 [inline]  allocate_slab+0x1b5/0x1010 mm/slub.c:1939  new_slab mm/slub.c:1992 [inline]  ___slab_alloc+0x10c3/0x2d60 mm/slub.c:3180  __slab_alloc mm/slub.c:3279 [inline]  slab_alloc_node mm/slub.c:3364 [inline]  slab_alloc mm/slub.c:3406 [inline]  __kmem_cache_alloc_lru mm/slub.c:3413 [inline]  kmem_cache_alloc_lru+0x6f3/0xb30 mm/slub.c:3429  alloc_inode_sb include/linux/fs.h:3117 [inline]  ext4_alloc_inode+0x5f/0x860 fs/ext4/super.c:1321  alloc_inode+0x83/0x440 fs/inode.c:259  new_inode_pseudo fs/inode.c:1018 [inline]  new_inode+0x3b/0x430 fs/inode.c:1046  __ext4_new_inode+0x2a7/0x7ec0 fs/ext4/ialloc.c:959  ext4_mkdir+0x4d5/0x1560 fs/ext4/namei.c:2992  vfs_mkdir+0x62a/0x870 fs/namei.c:4035  do_mkdirat+0x466/0x7b0 fs/namei.c:4060  __do_sys_mkdirat fs/namei.c:4075 [inline]  __se_sys_mkdirat fs/namei.c:4073 [inline]  __ia32_sys_mkdirat+0xc4/0x120 fs/namei.c:4073  do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]  __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178  do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203  do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246  entry_SYSENTER_compat_after_hwframe+0x70/0x82  CPU: 1 PID: 4625 Comm: syz-executor.2 Not tainted 6.1.0-rc4-syzkaller-62821-gcb231e2f67ec #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 =====================================================  Now, 'ext4_alloc_inode()' didn't init 'ei-\u003ei_flags'. If new inode failed before set 'ei-\u003ei_flags' in '__ext4_new_inode()', then do 'iput()'. As after 6bc0d63dad7f commit will access 'ei-\u003ei_flags' in 'ext4_evict_inode()' which will lead to access uninit-value. To solve above issue just init 'ei-\u003ei_flags' in 'ext4_alloc_inode()'.","modified":"2026-09-01T16:05:35.643595972Z","published":"2025-10-07T16:15:39.147Z","upstream":["CVE-2022-50546"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50546"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50546.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50546.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.4-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50546.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}