What’s Vulnerable › Vulnerabilities

CVE-2026-23451: bonding: prevent potential infinite loop in bond_header_parse()

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-03 · updated 2026-10-30
• Weakness: CWE-835

Description

In the Linux kernel, the following vulnerability has been resolved: bonding: prevent potential infinite loop in bond_header_parse() bond_header_parse() can loop if a stack of two bonding devices is setup, because skb->dev always points to the hierarchy top. Add new "const struct net_device *dev" parameter to (struct header_ops)->parse() method to make sure the recursion is bounded, and that the final leaf parse method is called.

Affected products

• Linux kernel: 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4; 6.12.78, 6.18.19, 6.19.9 (and their updates)
• Linux: from 6.1.191 before 6.2 — fixed in 6.2

How to fix

Upgrade to a fixed version: Linux 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4172a7901cf43fe1cc63ef7a2ef33735ff7b7d13
• https://git.kernel.org/stable/c/946bb6cacf0ccada7bc80f1cfa07c1ed79511c1c
• https://git.kernel.org/stable/c/9532d0d0ad1d726c06f807e8f0f1ec93cbabb452
• https://git.kernel.org/stable/c/9b49c854f14f5e2d493e562a1e28d2e57fe37371
• https://git.kernel.org/stable/c/b7405dcf7385445e10821777143f18c3ce20fa04

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