# CVE-2024-44942: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to do sanity check on F2FS_INLINE_DATA...

CVE-2024-44942 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-44942, released August 26, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-44942
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 26, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC  syzbot reports a f2fs bug as below:  ------------[ cut here ]------------ kernel BUG at fs/f2fs/inline.c:258! CPU: 1 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0 RIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258 Call Trace:  f2fs_write_single_data_page+0xb65/0x1d60 fs/f2fs/data.c:2834  f2fs_write_cache_pages fs/f2fs/data.c:3133 [inline]  __f2fs_write_data_pages fs/f2fs/data.c:3288 [inline]  f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3315  do_writepages+0x35b/0x870 mm/page-writeback.c:2612  __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650  writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941  wb_writeback+0x457/0xce0 fs/fs-writeback.c:2117  wb_do_writeback fs/fs-writeback.c:2264 [inline]  wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304  process_one_work kernel/workqueue.c:3254 [inline]  process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335  worker_thread+0x86d/0xd70 kernel/workqueue.c:3416  kthread+0x2f2/0x390 kernel/kthread.c:388  ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244  The root cause is: inline_data inode can be fuzzed, so that there may be valid blkaddr in its direct node, once f2fs triggers background GC to migrate the block, it will hit f2fs_bug_on() during dirty page writeback.  Let's add sanity check on F2FS_INLINE_DATA flag in inode during GC, so that, it can forbid migrating inline_data inode's data block for fixing.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.10.6-1 | [DEBIAN-CVE-2024-44942](https://patchblox.com/security/data/fix/linux/debian-cve-2024-44942.md) | Aug 26, 2024 |
| Linux | linux Debian 14 | 6.10.6-1 | [DEBIAN-CVE-2024-44942](https://patchblox.com/security/data/fix/linux/debian-cve-2024-44942.md) | Aug 26, 2024 |

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Data as of 2026-11-08T13:06:02Z 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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