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CVE-2025-21766 In the Linux kernel, the following vulnerability has been resolved: ipv4: use RCU protection in __ip_rt_update_pmtu()…

Description

In the Linux kernel, the following vulnerability has been resolved: ipv4: use RCU protection in __ip_rt_update_pmtu() __ip_rt_update_pmtu() must use RCU protection to make sure the net structure it reads does not disappear.

Affected products and versions

Product Affected versions Fixed in
Linux 6.14 earliest → < 6.14 6.14
Linux 6.13 earliest → < 6.13.4 6.13.4
Linux 6.12 earliest → < 6.12.16 6.12.16
Linux 6.6 earliest → < 6.6.79 6.6.79
Linux 6.1 earliest → < 6.1.129 6.1.129
Linux 5.15 earliest → < 5.15.179 5.15.179
Linux 5.9 No fix stated
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
Show the 2 other branches
Product Affected versions Fixed in
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.5 → latest No fix stated
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions not published
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