# CVE-2022-50753: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to do sanity check on summary info  As...

CVE-2022-50753 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50753, released December 24, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-50753
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 24, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to do sanity check on summary info  As Wenqing Liu reported in bugzilla:  https://bugzilla.kernel.org/show_bug.cgi?id=216456  BUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs] Read of size 4 at addr ffff8881464dcd80 by task mount/1013  CPU: 3 PID: 1013 Comm: mount Tainted: G        W          6.0.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 Call Trace:  dump_stack_lvl+0x45/0x5e  print_report.cold+0xf3/0x68d  kasan_report+0xa8/0x130  recover_data+0x63ae/0x6ae0 [f2fs]  f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs]  f2fs_fill_super+0x4665/0x61e0 [f2fs]  mount_bdev+0x2cf/0x3b0  legacy_get_tree+0xed/0x1d0  vfs_get_tree+0x81/0x2b0  path_mount+0x47e/0x19d0  do_mount+0xce/0xf0  __x64_sys_mount+0x12c/0x1a0  do_syscall_64+0x38/0x90  entry_SYSCALL_64_after_hwframe+0x63/0xcd  The root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node is larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size page.  - recover_data  - do_recover_data   - check_index_in_prev_nodes    - f2fs_data_blkaddr  This patch adds sanity check on summary info in recovery and GC flow in where the flows rely on them.  After patch: [   29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.3-1 | [DEBIAN-CVE-2022-50753](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50753.md) | Dec 24, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.3-1 | [DEBIAN-CVE-2022-50753](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50753.md) | Dec 24, 2025 |
| Linux | linux Debian 14 | 6.0.3-1 | [DEBIAN-CVE-2022-50753](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50753.md) | Dec 24, 2025 |

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