{"id":"DEBIAN-CVE-2025-22121","details":"In the Linux kernel, the following vulnerability has been resolved:  ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all()  There's issue as follows: BUG: KASAN: use-after-free in ext4_xattr_inode_dec_ref_all+0x6ff/0x790 Read of size 4 at addr ffff88807b003000 by task syz-executor.0/15172  CPU: 3 PID: 15172 Comm: syz-executor.0 Call Trace:  __dump_stack lib/dump_stack.c:82 [inline]  dump_stack+0xbe/0xfd lib/dump_stack.c:123  print_address_description.constprop.0+0x1e/0x280 mm/kasan/report.c:400  __kasan_report.cold+0x6c/0x84 mm/kasan/report.c:560  kasan_report+0x3a/0x50 mm/kasan/report.c:585  ext4_xattr_inode_dec_ref_all+0x6ff/0x790 fs/ext4/xattr.c:1137  ext4_xattr_delete_inode+0x4c7/0xda0 fs/ext4/xattr.c:2896  ext4_evict_inode+0xb3b/0x1670 fs/ext4/inode.c:323  evict+0x39f/0x880 fs/inode.c:622  iput_final fs/inode.c:1746 [inline]  iput fs/inode.c:1772 [inline]  iput+0x525/0x6c0 fs/inode.c:1758  ext4_orphan_cleanup fs/ext4/super.c:3298 [inline]  ext4_fill_super+0x8c57/0xba40 fs/ext4/super.c:5300  mount_bdev+0x355/0x410 fs/super.c:1446  legacy_get_tree+0xfe/0x220 fs/fs_context.c:611  vfs_get_tree+0x8d/0x2f0 fs/super.c:1576  do_new_mount fs/namespace.c:2983 [inline]  path_mount+0x119a/0x1ad0 fs/namespace.c:3316  do_mount+0xfc/0x110 fs/namespace.c:3329  __do_sys_mount fs/namespace.c:3540 [inline]  __se_sys_mount+0x219/0x2e0 fs/namespace.c:3514  do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46  entry_SYSCALL_64_after_hwframe+0x67/0xd1  Memory state around the buggy address:  ffff88807b002f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ffff88807b002f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 \u003effff88807b003000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff                    ^  ffff88807b003080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ffff88807b003100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  Above issue happens as ext4_xattr_delete_inode() isn't check xattr is valid if xattr is in inode. To solve above issue call xattr_check_inode() check if xattr if valid in inode. In fact, we can directly verify in ext4_iget_extra_inode(), so that there is no divergent verification.","modified":"2026-09-01T16:04:36.754444880Z","published":"2025-04-16T15:16:06.277Z","upstream":["CVE-2025-22121"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-22121"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.162-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22121.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.63-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22121.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16.3-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.107-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.3-1~bpo13+1","6.16~rc7-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-22121.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:N/A:H"}]}