What’s Vulnerable › Vulnerabilities

CVE-2022-50764: ipv6/sit: use DEV_STATS_INC() to avoid data-races

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6/sit: use DEV_STATS_INC() to avoid data-races syzbot/KCSAN reported that multiple cpus are updating dev->stats.tx_error concurrently. This is because sit tunnels are NETIF_F_LLTX, meaning their ndo_start_xmit() is not protected by a spinlock. While original KCSAN report was about tx path, rx path has the same issue.

Affected products

• Linux kernel: 2.6.37 — fixed in 6.2

How to fix

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

References

• https://git.kernel.org/stable/c/207501a986831174df09a36a8cb62a28f92f0dc8
• https://git.kernel.org/stable/c/222cc04356984f3f98acfa756a69d4bed7c501ac
• https://git.kernel.org/stable/c/4eed93bb3e57b8cc78d17166a14e40a73276015a
• https://git.kernel.org/stable/c/cb34b7cf17ecf33499c9298943f85af247abc1e9

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