CVE-2025-39795
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-674
- Record status
- Modified
Affected
- Linux Kernel < 5.10.241
- Linux Kernel < 5.15.190
- Linux Kernel < 6.1.149
- Linux Kernel < 6.6.103
- Linux Kernel < 6.12.43
- Linux Kernel < 6.15.11
- Linux Kernel < 6.16.2
- Debian Linux 11.0
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2025-39795.md and follow it. Check whether this project is affected by CVE-2025-39795. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f
- https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38
- https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9
- https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253
- https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8
- https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159
- https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2
- https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dc
References
- https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f
- https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38
- https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9
- https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253
- https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8
- https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159
- https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2
- https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dc
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html