# CVE-2025-40137: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to truncate first page in error path o...

CVE-2025-40137 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-40137, released November 12, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-40137
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 12, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to truncate first page in error path of f2fs_truncate()  syzbot reports a bug as below:  loop0: detected capacity change from 0 to 40427 F2FS-fs (loop0): Wrong SSA boundary, start(3584) end(4096) blocks(3072) F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop0): invalid crc value F2FS-fs (loop0): f2fs_convert_inline_folio: corrupted inline inode ino=3, i_addr[0]:0x1601, run fsck to fix. ------------[ cut here ]------------ kernel BUG at fs/inode.c:753! RIP: 0010:clear_inode+0x169/0x190 fs/inode.c:753 Call Trace:  <TASK>  evict+0x504/0x9c0 fs/inode.c:810  f2fs_fill_super+0x5612/0x6fa0 fs/f2fs/super.c:5047  get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692  vfs_get_tree+0x8f/0x2b0 fs/super.c:1815  do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808  do_mount fs/namespace.c:4136 [inline]  __do_sys_mount fs/namespace.c:4347 [inline]  __se_sys_mount+0x317/0x410 fs/namespace.c:4324  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]  do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94  entry_SYSCALL_64_after_hwframe+0x77/0x7f  During f2fs_evict_inode(), clear_inode() detects that we missed to truncate all page cache before destorying inode, that is because in below path, we will create page #0 in cache, but missed to drop it in error path, let's fix it.  - evict  - f2fs_evict_inode   - f2fs_truncate    - f2fs_convert_inline_inode     - f2fs_grab_cache_folio     : create page #0 in cache     - f2fs_convert_inline_folio     : sanity check failed, return -EFSCORRUPTED   - clear_inode detects that inode->i_data.nrpages is not zero

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.57-1 | [DEBIAN-CVE-2025-40137](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40137.md) | Nov 12, 2025 |
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40137](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40137.md) | Nov 12, 2025 |

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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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