CVE-2025-39795

MEDIUM

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.

CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Published: 9/12/2025Modified: 5/12/2026

Related Intelligence (1)

CRITICALData Breach

Siemens SIMATIC

<p><a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-134-10.json"><strong>View CSAF</strong></a></p> <h2>Summary</h2> <p><strong>SIMATIC CN 4100 contains multiple vulnerabilities which could potentially lead to a compromise in availability, integrity and confidentiality. Siemens has released a new version for SIMATIC CN 4100 and recommends to update to the late

CVE-2024-47704CVE-2024-57924
CISA Advisories

References (12)

https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392fPatchhttps://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38Patchhttps://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9Patchhttps://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253Patchhttps://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8Patchhttps://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159Patchhttps://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2Patchhttps://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dcPatchhttps://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisoryhttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisoryhttps://cert-portal.siemens.com/productcert/html/ssa-032379.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html