# CVE-2023-52848: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to drop meta_inode's page cache in f2f...

CVE-2023-52848 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52848, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52848
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to drop meta_inode's page cache in f2fs_put_super()  syzbot reports a kernel bug as below:  F2FS-fs (loop1): detect filesystem reference count leak during umount, type: 10, count: 1 kernel BUG at fs/f2fs/super.c:1639! CPU: 0 PID: 15451 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-09338-ge0152e7481c6 #0 RIP: 0010:f2fs_put_super+0xce1/0xed0 fs/f2fs/super.c:1639 Call Trace:  generic_shutdown_super+0x161/0x3c0 fs/super.c:693  kill_block_super+0x3b/0x70 fs/super.c:1646  kill_f2fs_super+0x2b7/0x3d0 fs/f2fs/super.c:4879  deactivate_locked_super+0x9a/0x170 fs/super.c:481  deactivate_super+0xde/0x100 fs/super.c:514  cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254  task_work_run+0x14d/0x240 kernel/task_work.c:179  resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]  exit_to_user_mode_loop kernel/entry/common.c:171 [inline]  exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204  __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]  syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296  do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86  entry_SYSCALL_64_after_hwframe+0x63/0xcd  In f2fs_put_super(), it tries to do sanity check on dirty and IO reference count of f2fs, once there is any reference count leak, it will trigger panic.  The root case is, during f2fs_put_super(), if there is any IO error in f2fs_wait_on_all_pages(), we missed to truncate meta_inode's page cache later, result in panic, fix this case.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.6.8-1 | [DEBIAN-CVE-2023-52848](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52848.md) | May 21, 2024 |
| Linux | linux Debian 14 | 6.6.8-1 | [DEBIAN-CVE-2023-52848](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52848.md) | May 21, 2024 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.