{"id":"DEBIAN-CVE-2026-23224","details":"In the Linux kernel, the following vulnerability has been resolved:  erofs: fix UAF issue for file-backed mounts w/ directio option  [    9.269940][ T3222] Call trace: [    9.269948][ T3222]  ext4_file_read_iter+0xac/0x108 [    9.269979][ T3222]  vfs_iocb_iter_read+0xac/0x198 [    9.269993][ T3222]  erofs_fileio_rq_submit+0x12c/0x180 [    9.270008][ T3222]  erofs_fileio_submit_bio+0x14/0x24 [    9.270030][ T3222]  z_erofs_runqueue+0x834/0x8ac [    9.270054][ T3222]  z_erofs_read_folio+0x120/0x220 [    9.270083][ T3222]  filemap_read_folio+0x60/0x120 [    9.270102][ T3222]  filemap_fault+0xcac/0x1060 [    9.270119][ T3222]  do_pte_missing+0x2d8/0x1554 [    9.270131][ T3222]  handle_mm_fault+0x5ec/0x70c [    9.270142][ T3222]  do_page_fault+0x178/0x88c [    9.270167][ T3222]  do_translation_fault+0x38/0x54 [    9.270183][ T3222]  do_mem_abort+0x54/0xac [    9.270208][ T3222]  el0_da+0x44/0x7c [    9.270227][ T3222]  el0t_64_sync_handler+0x5c/0xf4 [    9.270253][ T3222]  el0t_64_sync+0x1bc/0x1c0  EROFS may encounter above panic when enabling file-backed mount w/ directio mount option, the root cause is it may suffer UAF in below race condition:  - z_erofs_read_folio                          wq s_dio_done_wq  - z_erofs_runqueue   - erofs_fileio_submit_bio    - erofs_fileio_rq_submit     - vfs_iocb_iter_read      - ext4_file_read_iter       - ext4_dio_read_iter        - iomap_dio_rw        : bio was submitted and return -EIOCBQUEUED                                               - dio_aio_complete_work                                                - dio_complete                                                 - dio-\u003eiocb-\u003eki_complete (erofs_fileio_ki_complete())                                                  - kfree(rq)                                                  : it frees iocb, iocb.ki_filp can be UAF in file_accessed().        - file_accessed        : access NULL file point  Introduce a reference count in struct erofs_fileio_rq, and initialize it as two, both erofs_fileio_ki_complete() and erofs_fileio_rq_submit() will decrease reference count, the last one decreasing the reference count to zero will free rq.","modified":"2026-08-27T23:05:55.996268971Z","published":"2026-02-18T16:22:32.143Z","upstream":["CVE-2026-23224"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-23224"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.73-1"}]}],"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","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-23224.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.18.12-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","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","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~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-2026-23224.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"}]}