What’s Vulnerable › Vulnerabilities

CVE-2026-53233: netdev: fix double-free in netdev_nl_bind_rx_doit()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-25 · updated 2026-07-07
• Weakness: CWE-415

Description

In the Linux kernel, the following vulnerability has been resolved: netdev: fix double-free in netdev_nl_bind_rx_doit() Sashiko flags that genlmsg_reply() always consumes the skb. The error path calls nlmsg_free(rsp) so we can't jump directly to it. Let's not unbind, just propagate the error to the user. This is the typical way of handling genlmsg_reply() failures. They shouldn't happen unless user does something silly like calling the kernel with an already-full rcvbuf.

Affected products

• Linux kernel: from 6.12 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4, 7.1-rc5, 7.1-rc6 (+1) — fixed in 6.12.94, 6.18.36, 7.0.13

How to fix

Upgrade to a fixed version: Linux kernel 6.12.94, 6.18.36, 7.0.13. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/9b019376cbee10c4f9184d1745fa37d156e36f30
• https://git.kernel.org/stable/c/c299321bc6232770ce378d6fa6bc46004d2d7fdb
• https://git.kernel.org/stable/c/c849de7d8757a7af801fc4a4058f71d481d367f2
• https://git.kernel.org/stable/c/e055ca9205d3eb6aec3e5fe4ecc18abbbf18c599

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