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CVE-2025-39795— block: avoid possible overflow for chunk_sectors check in blk_stack_limits()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于blk_stack_limits函数中可能发生整数溢出，可能导致安全检查失效。

AI Predicted 5.5 Difficulty: Hard EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 22ada802ede89829dd010a317d9b812b7df7111a< 418751910044649baa2b424ea31cce3fc4dcc253 affected
22ada802ede89829dd010a317d9b812b7df7111a< 8b3ce085b52e674290cbfdd07034e7653ffbe4dc affected
22ada802ede89829dd010a317d9b812b7df7111a< 31f2f080898e50cbf2bae62d35f9f2a997547b38 affected
22ada802ede89829dd010a317d9b812b7df7111a< 3b9d69f0e68aa6b0acd9791c45d445154a8c66e9 affected
22ada802ede89829dd010a317d9b812b7df7111a< 46aa80ef49594ed7de685ecbc673b291e9a2c159 affected
22ada802ede89829dd010a317d9b812b7df7111a< 5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2 affected
22ada802ede89829dd010a317d9b812b7df7111a< 14beeef4aafecc8a41de534e31fb5be94739392f affected
22ada802ede89829dd010a317d9b812b7df7111a< 448dfecc7ff807822ecd47a5c052acedca7d09e8 affected
… +10 more rows
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I. Basic Information for CVE-2025-39795

Vulnerability Information
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Vulnerability Title
block: avoid possible overflow for chunk_sectors check in blk_stack_limits()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于blk_stack_limits函数中可能发生整数溢出，可能导致安全检查失效。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 22ada802ede89829dd010a317d9b812b7df7111a ~ 418751910044649baa2b424ea31cce3fc4dcc253 -
Linux Linux 5.10 -

II. Public POCs for CVE-2025-39795

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III. Intelligence Information for CVE-2025-39795

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Same Patch Batch · Linux · 2025-09-12 · 7 CVEs total

CVE-2025-39792 7.8 HIGH dm: Always split write BIOs to zoned device limits
CVE-2025-39793 7.8 HIGH io_uring/memmap: cast nr_pages to size_t before shifting
CVE-2025-39798 7.3 HIGH NFS: Fix the setting of capabilities when automounting a new filesystem
CVE-2025-39794 ARM: tegra: Use I/O memcpy to write to IRAM
CVE-2025-39796 net: lapbether: ignore ops-locked netdevs
CVE-2025-39797 xfrm: Duplicate SPI Handling

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39795

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