CVE-2025-39795
block: avoid possible overflow for chunk_sectors check in blk_stack_limits()
Description
In the Linux kernel, the following vulnerability has been resolved: block: avoid possible overflow for chunk_sectors check in blk_stack_limits() In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value. However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors.
INFO
Published Date :
Sept. 12, 2025, 4:15 p.m.
Last Modified :
Sept. 12, 2025, 4:15 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest version.
- Verify the chunk_sectors check is sector-based.
- Apply relevant security patches.
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-2025-39795.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-39795 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-2025-39795
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).
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The following list is the news that have been mention
CVE-2025-39795 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-39795 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.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 12, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: block: avoid possible overflow for chunk_sectors check in blk_stack_limits() In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value. However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors. Added Reference https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f Added Reference https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38 Added Reference https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9 Added Reference https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253 Added Reference https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8 Added Reference https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159 Added Reference https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2 Added Reference https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dc