CVE-2026-23234
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
f2fs: fix to avoid UAF in f2fs_write_end_io()
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid UAF in f2fs_write_end_io() As syzbot reported an use-after-free issue in f2fs_write_end_io(). It is caused by below race condition: loop device umount - worker_thread - loop_process_work - do_req_filebacked - lo_rw_aio - lo_rw_aio_complete - blk_mq_end_request - blk_update_request - f2fs_write_end_io - dec_page_count - folio_end_writeback - kill_f2fs_super - kill_block_super - f2fs_put_super : free(sbi) : get_pages(, F2FS_WB_CP_DATA) accessed sbi which is freed In kill_f2fs_super(), we will drop all page caches of f2fs inodes before call free(sbi), it guarantee that all folios should end its writeback, so it should be safe to access sbi before last folio_end_writeback(). Let's relocate ckpt thread wakeup flow before folio_end_writeback() to resolve this issue.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | 0fb58aff0dafd6837cc91f4154f3ed6e020358fa | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | 2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9 | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | 505e1c0530db6152cab3feef8e3e4da3d3e358c9 | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | acc2c97fc0005846e5cf11b5ba3189fef130c9b3 | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42 | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | 995030be4ce6338c6ff814583c14166446a64008 | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | a42f99be8a16b32a0bb91bb6dda212a6ad61be5d | Unavailable | None listed |
| e234088758fca3a669ebb1a02d8bf7bf60f0e4ff | affected | git | ce2739e482bce8d2c014d76c4531c877f382aa54 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.13 | Unavailable | None listed |
| 5.10.251 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.201 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.164 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.127 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.74 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.13 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.3 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |