CVE-2025-21988
fs/netfs/read_collect: add to next->prev_donated
Description
In the Linux kernel, the following vulnerability has been resolved: fs/netfs/read_collect: add to next->prev_donated If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front").
INFO
Published Date :
April 2, 2025, 1:15 p.m.
Last Modified :
Nov. 4, 2025, 6:56 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
- Update the Linux kernel to the latest version.
- Apply the specific patch for fs/netfs/read_collect.
- Recompile and deploy the updated kernel.
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-2025-21988.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-21988 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-2025-21988
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-2025-21988 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-21988 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]
Nov. 04, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.13.8 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.12 up to (excluding) 6.12.20 Added Reference Type kernel.org: https://git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e25cec3b76aba47a49138d2162fc809c6cd49c9e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e2d46f2ec332533816417b60933954173f602121 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 10, 2025
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024 Added Reference https://git.kernel.org/stable/c/e2d46f2ec332533816417b60933954173f602121 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 02, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: fs/netfs/read_collect: add to next->prev_donated If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front"). Added Reference https://git.kernel.org/stable/c/e25cec3b76aba47a49138d2162fc809c6cd49c9e