Kernel data disclosure via unconditional XDP warning
Published Oct 21, 2024 · Updated May 11, 2026
Improper warning handling in the Linux kernel bonding driver allows local users to disclose kernel data through a crafted XDP setup. bond_xdp_get_xmit_slave treats an unsupported bonding mode as impossible and invokes WARN_ON_ONCE while returning NULL, emitting diagnostic state instead of only a rate-limited error. The trigger requires privileged creation of two bond devices and XDP programs, including an unsupported ALB bond whose slave returns XDP_TX; the reported result is a warning and excess logging, not service interruption.
Summary
What happened
Improper warning handling in the Linux kernel bonding driver allows local users to disclose kernel data through a crafted XDP setup. bond_xdp_get_xmit_slave treats an unsupported bonding mode as impossible and invokes WARN_ON_ONCE while returning NULL, emitting diagnostic state instead of only a rate-limited error. The trigger requires privileged creation of two bond devices and XDP programs, including an unsupported ALB bond whose slave returns XDP_TX; the reported result is a warning and excess logging, not service interruption.
The record
- CVE
- CVE-2024-47734
- Published
- Oct 21, 2024
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 21, 2024CVE publishedPublication date reported by the CVE source.
- May 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=5.15
- Affected versionversion=9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e <0cbfd45fbcf0cb26d85c981b91c62fe73cdee01c
- Affected versionversion=9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e <57b5fba55c6f8b1d83312a34bd656166fcd95658
- Affected versionversion=9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e <6b64197b4bf1a5703a8b105367baf20f1e627a75
- Affected versionversion=9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e <72e2c0825a480e19ee999cee9d018850d38c82b9
- Affected versionversion=9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e <c1be35e774f8ed415e01209fddd963c5a74e8e9f
- Affected versionversion=9e2ee5c7e7c35d195e2aa0692a7241d47a433d1e <ccd3e6ff05e5236d1b9535f23f3e6622e0bb32b8
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
- syzbot bond_xdp_get_xmit_slave reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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