# CVE-2022-49380: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid f2fs_bug_on() in dec_valid_no...

CVE-2022-49380 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49380, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49380
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count()  As Yanming reported in bugzilla:  https://bugzilla.kernel.org/show_bug.cgi?id=215897  I have encountered a bug in F2FS file system in kernel v5.17.  The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands:  The kernel message is shown below:  kernel BUG at fs/f2fs/f2fs.h:2511! Call Trace:  f2fs_remove_inode_page+0x2a2/0x830  f2fs_evict_inode+0x9b7/0x1510  evict+0x282/0x4e0  do_unlinkat+0x33a/0x540  __x64_sys_unlinkat+0x8e/0xd0  do_syscall_64+0x3b/0x90  entry_SYSCALL_64_after_hwframe+0x44/0xae  The root cause is: .total_valid_block_count or .total_valid_node_count could fuzzed to zero, then once dec_valid_node_count() was called, it will cause BUG_ON(), this patch fixes to print warning info and set SBI_NEED_FSCK into CP instead of panic.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49380](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49380.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49380](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49380.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49380](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49380.md) | Feb 26, 2025 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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