Bug 2492809 (CVE-2026-53233) - CVE-2026-53233 kernel: netdev: fix double-free in netdev_nl_bind_rx_doit()
Summary: CVE-2026-53233 kernel: netdev: fix double-free in netdev_nl_bind_rx_doit()
Keywords:
Status: NEW
Alias: CVE-2026-53233
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 10:06 UTC by OSIDB Bzimport
Modified: 2026-06-26 01:07 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-06-25 10:06:57 UTC
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.


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