What is CVE-2021-47007?

CVE-2021-47007 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-47007 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47007?

CVE-2021-47007 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47007?

No patch is currently available for CVE-2021-47007. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47007 actively exploited?

CVE-2021-47007 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47007

Medium

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().

Package Linux Kernel

Published 2024-02-28

Last modified 2025-01-08

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-754

CVE-2021-47007 is classified as CWE-754

See CWE-754 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-47007 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6
Patch
Kernel patch commit
https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-47007

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2025-01-08

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47007?

CVE-2021-47007 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-47007 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47007?

CVE-2021-47007 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47007?

No patch is currently available for CVE-2021-47007. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47007 actively exploited?

No — CVE-2021-47007 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.