CVE-2025-39795
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…
Does this matter?
Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-674
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392fPatch
- https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38Patch
- https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9Patch
- https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253Patch
- https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8Patch
- https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159Patch
- https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2Patch
- https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dcPatch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.