What’s Vulnerable › Vulnerabilities

CVE-2026-74288: net: fib_rules: Don't dump dying fib_rule in fib_rules_dump().

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: net: fib_rules: Don't dump dying fib_rule in fib_rules_dump(). rocker_router_fib_event() calls fib_rule_get() during RCU dump. If the fib_rule is dying, refcount_inc() will complain about it. Let's call refcount_inc_not_zero() in fib_rules_dump().

Affected products

• Linux kernel: 4.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0f929b59f4cd0e05bb1ecefe12b77e85911d4be2
• https://git.kernel.org/stable/c/1fbc6c6efe78f4454a51afa0587efb6826f60f00
• https://git.kernel.org/stable/c/2821e85c058f81c9948a2fb1a634f7b47457d51c
• https://git.kernel.org/stable/c/2dfdc210d240bd48bb2ea746430b02b5571b6db9
• https://git.kernel.org/stable/c/3af0bc1bd9039e2e50abf3e2d7fee411f38bce4e
• https://git.kernel.org/stable/c/4b7ae30c81c2ee10a644749a3704a5c797ccc308
• https://git.kernel.org/stable/c/a7ef30753353ba6a95d693b1863a0214222a199a
• https://git.kernel.org/stable/c/bb4a5b3c91af3c8d705bb2e9f6f8069a70db26fc

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