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CVE-2025-71097: Linux, отказ на услуга

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Атакува се

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Време до експлоатация

CVE радар: още уязвимости от този вид

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  • Атаката не може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ipv4: Fix reference count leak when using error routes with nexthop objects When a nexthop object is deleted, it is marked as dead and then fib_table_flush() is called to flush all the routes that are using the dead nexthop. The current logic in fib_table_flush() is to only flush error routes (e.g., blackhole) when it is called as part of network namespace dismantle (i.e., with flush_all=true). Therefore, error routes are not flushed when their nexthop object is deleted: # ip link add name dummy1 up type dummy # ip nexthop add id 1 dev dummy1 # ip route add 198.51.100.1/32 nhid 1 # ip route add blackhole 198.51.100.2/32 nhid 1 # ip nexthop del id 1 # ip route show blackhole 198.51.100.2 nhid 1 dev dummy1 As such, they keep holding a reference on the nexthop object which in turn holds a reference on the nexthop device, resulting in a reference count leak: # ip link del dev dummy1 [ 70.516258] unregister_netdevice: waiting for dummy1 to become free. Usage count = 2 Fix by flushing error routes when their nexthop is marked as dead. IPv6 does not suffer from this problem.

Засегнати продукти

  • Linux Linux: 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди 5de7ad7e18356e39e8fbf7edd185a5faaf4f385a; 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди 33ff5c207c873215e54e6176624ed57423cb7dea; 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди 30386e090c49e803c0616a7147e43409c32a2b0e; 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди 5979338c83012110ccd45cae6517591770bfe536; 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди ee4183501ea556dca31f5ffd8690aa9fd25b609f; 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди e3fc381320d04e4a74311e576a86cac49a16fc43; 493ced1ac47c48bb86d9d4e8e87df8592be85a0e преди ac782f4e3bfcde145b8a7f8af31d9422d94d172a
  • Linux Linux: 5.3; преди 5.3; 5.10.248 до 5.10.*; 5.15.198 до 5.15.*; 6.1.160 до 6.1.*; 6.6.120 до 6.6.*; 6.12.64 до 6.12.*; 6.18.4 до 6.18.*; 6.19 до *
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: V3.1.6 преди *
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *

Вид слабост

История

  • 13 януари 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2025-71097: Linux, отказ на услуга | freedomonline.bg