CVE-2026-74565
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
In the Linux kernel, netfilter nf_tables has a use-after-free vulnerability due to a global rhltable for nft objects. This allows access to objects being dismantled from other network namespaces, potentially leading to use-after-free.
Risk Assessment
An attacker with privileges to create nftables rules could exploit this to gain unauthorized memory access or cause a system crash (DoS).
Recommendation
Apply the Linux kernel patch that makes the rhltable per table. Update your system to a kernel version containing this fix.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: make nft_object rhltable per table The nft_object rhltable is global, this allows for accessing objects that are being dismangled from lookup path by other existing netns. Given the nft_obj_destroy() releases the object inmediately, this might lead to use-after-free of these objects that are being released. Make the existing rhltable per table to address this issue to deal with with the nft_rcv_nl_event() path too. Update nft_obj_lookup() to take the table as non-const, otherwise, compiler complains when passing the objname_ht to rhltable_lookup().