CVE-2025-40170
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-12

Last updated on: 2025-11-12

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: use dst_dev_rcu() in sk_setup_caps() Use RCU to protect accesses to dst->dev from sk_setup_caps() and sk_dst_gso_max_size(). Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(), and ip_dst_mtu_maybe_forward(). ip4_dst_hoplimit() can use dst_dev_net_rcu().
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Meta Information
Published
2025-11-12
Last Modified
2025-11-12
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-14
NVD
CVE-2025-40170
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel involves improper handling of device pointers (dst->dev) in network-related functions such as sk_setup_caps() and sk_dst_gso_max_size(). The fix uses Read-Copy-Update (RCU) mechanisms to protect these accesses, preventing potential race conditions or use-after-free errors when accessing network device structures.

Impact Analysis

If exploited, this vulnerability could lead to kernel instability or crashes due to improper synchronization when accessing network device data. This might allow attackers to cause denial of service or potentially escalate privileges by exploiting race conditions in the kernel networking code.

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