CVE-2021-47007
F2FS Linux Kernel Data Corruption and Crash Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix panic during f2fs_resize_fs() f2fs_resize_fs() hangs in below callstack with testcase: - mkfs 16GB image & mount image - dd 8GB fileA - dd 8GB fileB - sync - rm fileA - sync - resize filesystem to 8GB kernel BUG at segment.c:2484! Call Trace: allocate_segment_by_default+0x92/0xf0 [f2fs] f2fs_allocate_data_block+0x44b/0x7e0 [f2fs] do_write_page+0x5a/0x110 [f2fs] f2fs_outplace_write_data+0x55/0x100 [f2fs] f2fs_do_write_data_page+0x392/0x850 [f2fs] move_data_page+0x233/0x320 [f2fs] do_garbage_collect+0x14d9/0x1660 [f2fs] free_segment_range+0x1f7/0x310 [f2fs] f2fs_resize_fs+0x118/0x330 [f2fs] __f2fs_ioctl+0x487/0x3680 [f2fs] __x64_sys_ioctl+0x8e/0xd0 do_syscall_64+0x33/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The root cause is we forgot to check that whether we have enough space in resized filesystem to store all valid blocks in before-resizing filesystem, then allocator will run out-of-space during block migration in free_segment_range().
INFO
Published Date :
Feb. 28, 2024, 9:15 a.m.
Last Modified :
Jan. 8, 2025, 5:58 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- There is no known solution at this time.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47007.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47007 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47007
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47007 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47007 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jan. 08, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NIST CWE-754 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.8 up to (excluding) 5.10.38 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.22 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.5 Changed Reference Type https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f No Types Assigned https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f Patch Changed Reference Type https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f No Types Assigned https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f Patch Changed Reference Type https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6 No Types Assigned https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6 Patch Changed Reference Type https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6 No Types Assigned https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6 Patch Changed Reference Type https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2 No Types Assigned https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2 Patch Changed Reference Type https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2 No Types Assigned https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2 Patch Changed Reference Type https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705 No Types Assigned https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705 Patch Changed Reference Type https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705 No Types Assigned https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f Added Reference https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6 Added Reference https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2 Added Reference https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 28, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: f2fs: fix panic during f2fs_resize_fs() f2fs_resize_fs() hangs in below callstack with testcase: - mkfs 16GB image & mount image - dd 8GB fileA - dd 8GB fileB - sync - rm fileA - sync - resize filesystem to 8GB kernel BUG at segment.c:2484! Call Trace: allocate_segment_by_default+0x92/0xf0 [f2fs] f2fs_allocate_data_block+0x44b/0x7e0 [f2fs] do_write_page+0x5a/0x110 [f2fs] f2fs_outplace_write_data+0x55/0x100 [f2fs] f2fs_do_write_data_page+0x392/0x850 [f2fs] move_data_page+0x233/0x320 [f2fs] do_garbage_collect+0x14d9/0x1660 [f2fs] free_segment_range+0x1f7/0x310 [f2fs] f2fs_resize_fs+0x118/0x330 [f2fs] __f2fs_ioctl+0x487/0x3680 [f2fs] __x64_sys_ioctl+0x8e/0xd0 do_syscall_64+0x33/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The root cause is we forgot to check that whether we have enough space in resized filesystem to store all valid blocks in before-resizing filesystem, then allocator will run out-of-space during block migration in free_segment_range(). Added Reference Linux https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6 [No types assigned]