What’s Vulnerable › Vulnerabilities

CVE-2026-72435: netfilter: ipset: fix order of kfree_rcu() and rcu_assign_pointer()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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: netfilter: ipset: fix order of kfree_rcu() and rcu_assign_pointer() Sashiko pointed out that kfree_rcu() was called before rcu_assign_pointer() in handling the comment extension. Fix the order so that rcu_assign_pointer() called first.

Affected products

• Linux kernel: 4.2 — 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/3ca9982a8882470aa0ac4e8bb9a552b181d1efcd
• https://git.kernel.org/stable/c/50b70f56f3baaff46599f59b2d93fa2540120776
• https://git.kernel.org/stable/c/6e98407cb94e035bba98956adc9096a76d8b2a9f
• https://git.kernel.org/stable/c/8087bb360a936a6314d22b567e4b861656943eb6
• https://git.kernel.org/stable/c/93a775fd67f3ef34949a9523bfa69403ee74efdd
• https://git.kernel.org/stable/c/c9787d7c24ffd83019f379455e1b97fb4f0f75eb
• https://git.kernel.org/stable/c/d01b4b471f0fc5c396af62845e972ccf99cee29a
• https://git.kernel.org/stable/c/fcb565966534909377a16be5f7b065db2e25c8b5

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