{"id":"DEBIAN-CVE-2022-49348","details":"In the Linux kernel, the following vulnerability has been resolved:  ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state  The EXT4_FC_REPLAY bit in sbi-\u003es_mount_state is used to indicate that we are in the middle of replay the fast commit journal.  This was actually a mistake, since the sbi-\u003es_mount_info is initialized from es-\u003es_state.  Arguably s_mount_state is misleadingly named, but the name is historical --- s_mount_state and s_state dates back to ext2.  What should have been used is the ext4_{set,clear,test}_mount_flag() inline functions, which sets EXT4_MF_* bits in sbi-\u003es_mount_flags.  The problem with using EXT4_FC_REPLAY is that a maliciously corrupted superblock could result in EXT4_FC_REPLAY getting set in s_mount_state.  This bypasses some sanity checks, and this can trigger a BUG() in ext4_es_cache_extent().  As a easy-to-backport-fix, filter out the EXT4_FC_REPLAY bit for now.  We should eventually transition away from EXT4_FC_REPLAY to something like EXT4_MF_REPLAY.","modified":"2026-09-01T16:05:30.562443869Z","published":"2025-02-26T07:01:11.533Z","upstream":["CVE-2022-49348"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49348"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49348.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49348.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49348.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:N/I:N/A:H"}]}