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CVE-2026-23171 is a use-after-free vulnerability in the Linux kernel bonding subsystem. A newly attached subordinate interface is published in the bonding slave array before XDP setup and other failure-prone enslavement operations have completed. If enslavement subsequently fails, the error-cleanup path frees the allocated slave structure while concurrent transmission can still reference it. A reproduction using balance-xor bonding, an XDP pass program, repeated attachment of a dummy interface, and concurrent traffic triggers a general protection fault in netdev_core_pick_tx, with bond_start_xmit in the call trace. The vulnerability can cause a kernel crash and potentially arbitrary kernel-context code execution.
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23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A use-after-free vulnerability in Linux kernel network bonding occurs when a slave interface is added to the transmission array before setup completes, and subsequent failure cleanup frees memory still accessible to transmission. The reference demonstrates a kernel crash and assigns CVSS v3 severity 7.8, with local access and low privileges required. The fix moves the slave array update after XDP setup. Affected Google COS kernel packages should be updated to version 19506.120.115 or later.
A Linux kernel bonding driver use-after-free vulnerability triggered when enslave fails after the new slave has already been added to the slave array, potentially leading to a kernel crash.
A use-after-free vulnerability in the Linux kernel bonding subsystem caused by an enslave failure after the new slave has been added to the array, allowing the freed slave structure to be used for transmission and leading to a crash.
A use-after-free vulnerability in the Linux kernel bonding module can cause a system crash or arbitrary code execution. The advisory supplies a kernel update that fixes the flaw.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.