CVE-2025-40279
Unknown
Description
In the Linux kernel, the following vulnerability has been resolved: net: sched: act_connmark: initialize struct tc_ife to fix kernel leak In tcf_connmark_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedDec 6, 2025
First seenDec 6, 2025
How to fix
Update
- Linux Linux218b67c8c8246d47a2a7910eae80abe4861fe2b7, 73cc56c608c209d3d666cc571293b090a471da70, 31e4aa93e2e5b5647fc235b0f6ee329646878f9e, 51cb05d4fd632596816ba44e882e84db9fb28a7e, 25837889ec062f2b7618142cd80253dff3da5343, 62b656e43eaeae445a39cd8021a4f47065af4389 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae ≤ v < 218b67c8c8246d47a2a7910eae80abe4861fe2b7, 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae ≤ v < 73cc56c608c209d3d666cc571293b090a471da70, 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae ≤ v < 31e4aa93e2e5b5647fc235b0f6ee329646878f9e, 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae ≤ v < 51cb05d4fd632596816ba44e882e84db9fb28a7e, 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae ≤ v < 25837889ec062f2b7618142cd80253dff3da5343, 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae ≤ v < 62b656e43eaeae445a39cd8021a4f47065af4389, 4.0 | 218b67c8c8246d47a2a7910eae80abe4861fe2b7, 73cc56c608c209d3d666cc571293b090a471da70, 31e4aa93e2e5b5647fc235b0f6ee329646878f9e, 51cb05d4fd632596816ba44e882e84db9fb28a7e, 25837889ec062f2b7618142cd80253dff3da5343, 62b656e43eaeae445a39cd8021a4f47065af4389 |
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