What’s Vulnerable › Vulnerabilities

CVE-2026-53157: net: phonet: free phonet_device after RCU grace period

• 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: 2026-06-25 · updated 2026-07-07
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: net: phonet: free phonet_device after RCU grace period phonet_device_destroy() removes a phonet_device from the per-net device list with list_del_rcu(), but frees it immediately. RCU readers walking the same list can still hold a pointer to the object after it has been removed, leading to a slab-use-after-free. Use kfree_rcu(), matching the lifetime rule already used by phonet_address_del() for the same object type.

Affected products

• Linux kernel: from 2.6.33 before 5.10.260; from 5.11 before 5.15.211; from 5.16 before 6.1.177; from 6.2 before 6.6.144; from 6.7 before 6.12.95; from 6.13 before 6.18.36 — fixed in 5.10.260, 5.15.211, 6.1.177, 6.12.95, 6.18.36, 6.6.144

How to fix

Upgrade to a fixed version: Linux kernel 5.10.260, 5.15.211, 6.1.177, 6.12.95. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09c9b92c2010481160245244ea8fa1d06d5d4ae0
• https://git.kernel.org/stable/c/2ec8011cce0cd0fc7a5068585d867fc08d508578
• https://git.kernel.org/stable/c/52b8f5ef82c886f7cd24617915e4b1579ddfd001
• https://git.kernel.org/stable/c/6cd7067d6e4b0b2033ba2f918ecbd54dc2af3763
• https://git.kernel.org/stable/c/71de0177b28da751f407581a4515cf4d762f6296
• https://git.kernel.org/stable/c/bd2ab4d800fc26814d89328d87b5f97ef6aa906a
• https://git.kernel.org/stable/c/bff309ea51f1395c1ef8be8b75ce62d28a319113
• https://git.kernel.org/stable/c/d59794337ea496042288c7c68356d9b9ca7f46a9

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