Bug 2454803 (CVE-2026-23451)

Summary: CVE-2026-23451 kernel: bonding: prevent potential infinite loop in bond_header_parse()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's bonding component. When a specific network configuration involving a stack of two bonding devices is set up, the `bond_header_parse()` function can enter an infinite loop. This vulnerability can lead to a Denial of Service (DoS), making the affected system unresponsive.
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Description OSIDB Bzimport 2026-04-03 16:01:32 UTC 
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.
Comment 1 Jon Moroney 2026-04-03 19:44:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026040316-CVE-2026-23451-1298@gregkh/T