CVE-2026-92489
Published Sep 17, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix skb double-free in xfrm_dev_direct_output() A return value other than 1 from local_out() means that the skb has been consumed or its ownership was transferred. xfrm_dev_direct_output() nevertheless frees the skb on this path, causing a double-free when netfilter drops the packet and invalidating any other owner. Return the local_out() result directly, matching the ownership handling in xfrm_output_resume().
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References
Other References
https://git.kernel.org/stable/c/02deb637e965950148752a304dd1471212dd6470
https://git.kernel.org/stable/c/2aed51fc58d9ce450e2c116efb956160fd06fa02
https://git.kernel.org/stable/c/56a347950e661c1a7f8f31c43a2ea53c2323b6f4
https://git.kernel.org/stable/c/621871b696b108026bf4b44ed4085ffa2102f417
https://git.kernel.org/stable/c/bc9297796bfdcc8d9609236e54519a4f38737aac
Frequently Asked Questions
What is CVE-2026-92489? +
In the Linux kernel, the following vulnerability has been resolved:
xfrm: Fix skb double-free in xfrm_dev_direct_output()
A return value other than 1 from local_out() means that the skb has been
consumed or its ownership was transferred. xfrm_dev_direct_output()
nevertheless frees the skb on this path, causing a double-free when
netfilter drops the packet and invalidating any other owner.
Return the local_out() result directly, matching the ownership handling
in xfrm_output_resume().
How do I check if I'm vulnerable to CVE-2026-92489? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.