# CVE-2022-49363: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to do sanity check on block address in...

CVE-2022-49363 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49363, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49363
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0028
- 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 do sanity check on block address in f2fs_do_zero_range()  As Yanming reported in bugzilla:  https://bugzilla.kernel.org/show_bug.cgi?id=215894  I have encountered a bug in F2FS file system in kernel v5.17.  I have uploaded the system call sequence as case.c, and a fuzzed image can be found in google net disk  The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands:  kernel BUG at fs/f2fs/segment.c:2291! Call Trace:  f2fs_invalidate_blocks+0x193/0x2d0  f2fs_fallocate+0x2593/0x4a70  vfs_fallocate+0x2a5/0xac0  ksys_fallocate+0x35/0x70  __x64_sys_fallocate+0x8e/0xf0  do_syscall_64+0x3b/0x90  entry_SYSCALL_64_after_hwframe+0x44/0xae  The root cause is, after image was fuzzed, block mapping info in inode will be inconsistent with SIT table, so in f2fs_fallocate(), it will cause panic when updating SIT with invalid blkaddr.  Let's fix the issue by adding sanity check on block address before updating SIT table with it.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49363](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49363.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49363](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49363.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49363](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49363.md) | Feb 26, 2025 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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