PT-2026-36444 · Linux+1 · Linux Kernel+1
Published
2026-03-30
·
Updated
2026-05-28
·
CVE-2026-43027
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free issue exists in the netfilter
nf conntrack helper component. The function nf conntrack helper unregister() calls nf ct expect iterate destroy() to remove expectations associated with a helper being unregistered, but it incorrectly passes NULL instead of the helper pointer as the data argument. Consequently, expect iter me() fails to match any expectations, leaving them active. When nfnl cthelper del() subsequently frees the helper object, later expectation dumps or packet-driven init conntrack() calls dereference the freed exp->helper pointer.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
DoS
Use After Free
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Related Identifiers
Affected Products
Linux Kernel
Rocky Linux