CVE-2026-23212
📋 TL;DR
This CVE describes a data race condition in the Linux kernel's bonding driver where slave->last_rx and slave->target_last_arp_rx fields can be accessed concurrently without proper synchronization. This could lead to kernel memory corruption or system instability. Systems using Linux kernel bonding interfaces are affected.
💻 Affected Systems
- Linux kernel
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Kernel panic or system crash leading to denial of service, potentially allowing privilege escalation if memory corruption leads to arbitrary code execution.
Likely Case
System instability, network bonding interface failures, or kernel crashes causing temporary service disruption.
If Mitigated
Minor performance impact or no noticeable effect if race condition doesn't trigger during normal operation.
🎯 Exploit Status
Exploitation requires sending network packets to trigger the race condition in bond_rcv_validate function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Kernel versions containing commits: 8c0be3277e7aefb2f900fc37ca3fe7df362e26f5, a7516cb0165926d308187e231ccd330e5e3ebff7, b956289b83887e0a306067b6003c3fcd81bfdf84, bd98324e327e41de04b13e372cc16f73150df254, f6c3665b6dc53c3ab7d31b585446a953a74340ef
Vendor Advisory: https://git.kernel.org/stable/c/8c0be3277e7aefb2f900fc37ca3fe7df362e26f5
Restart Required: Yes
Instructions:
1. Update Linux kernel to patched version from your distribution vendor. 2. Reboot system to load new kernel. 3. Verify kernel version after reboot.
🔧 Temporary Workarounds
Disable bonding interfaces
linuxTemporarily disable network bonding interfaces if not essential
sudo ip link set bond0 down
Network isolation
allIsolate systems using bonding interfaces from untrusted networks
🧯 If You Can't Patch
- Monitor system logs for kernel panics or bonding interface failures
- Implement network segmentation to limit exposure to potential exploit traffic
🔍 How to Verify
Check if Vulnerable:
Check if bonding interfaces are active: ip link show | grep bond && check kernel version against patched versionsCheck Version:
uname -rVerify Fix Applied:
Verify kernel version contains the fix commits and test bonding interface functionality📡 Detection & Monitoring
Log Indicators:
- Kernel panic messages
- Bonding driver errors in dmesg
- Network interface failures
Network Indicators:
- Unusual network traffic patterns targeting bonding interfaces
- Increased packet loss on bonded interfaces
SIEM Query:
source="kernel" AND ("panic" OR "bonding" OR "last_rx")🔗 References
- https://git.kernel.org/stable/c/8c0be3277e7aefb2f900fc37ca3fe7df362e26f5
- https://git.kernel.org/stable/c/a7516cb0165926d308187e231ccd330e5e3ebff7
- https://git.kernel.org/stable/c/b956289b83887e0a306067b6003c3fcd81bfdf84
- https://git.kernel.org/stable/c/bd98324e327e41de04b13e372cc16f73150df254
- https://git.kernel.org/stable/c/f6c3665b6dc53c3ab7d31b585446a953a74340ef
