Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix use-after-free on object destroy nft_tunnel_obj_destroy() calls metadata_dst_free() which directly kfree()s the metadata_dst, ignoring the dst_entry refcount. Packets that took a reference via dst_hold() in nft_tunnel_obj_eval() and are still queued (e.g. in a netem qdisc) are left with a dangling pointer. When these packets are eventually dequeued, dst_release() operates on freed memory. Replace metadata_dst_free() with dst_release() so the metadata_dst is freed only after all references are dropped. The dst subsystem already handles metadata_dst cleanup in dst_destroy() when DST_METADATA is set.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | af308b94a2a4a5a27bec9028354c4df444a7c8ba to <349df61526d2e39decc685d246202e3e284cfe05; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <55b79b1ae42372012413ce0413181d26679b17ef; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <5e9ee18b27fde88cb6148202b33916c66693fe82; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <8767fe4079affa74314d7eb3220e700150289842; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <fda6573a46ad24f35348e024905ee5bdf729797e; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <f9a0e4b61054cde89a2a77845293c726cc07cc43; af308b94a2a4a5a27bec9028354c4df444a7c8ba to <c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a |
| Linux | Linux | 4.19; 0 to <4.19; 5.10.259 to <=5.10.*; 5.15.210 to <=5.15.*; 6.1.176 to <=6.1.*; 6.6.143 to <=6.6.*; 6.12.94 to <=6.12.*; 6.18.36 to <=6.18.*; 7.0.13 to <=7.0.*; 7.1 to <=* |
References
- https://git.kernel.org/stable/c/349df61526d2e39decc685d246202e3e284cfe05
- https://git.kernel.org/stable/c/55b79b1ae42372012413ce0413181d26679b17ef
- https://git.kernel.org/stable/c/5e9ee18b27fde88cb6148202b33916c66693fe82
- https://git.kernel.org/stable/c/8767fe4079affa74314d7eb3220e700150289842
- https://git.kernel.org/stable/c/fda6573a46ad24f35348e024905ee5bdf729797e
- https://git.kernel.org/stable/c/941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3
- https://git.kernel.org/stable/c/f9a0e4b61054cde89a2a77845293c726cc07cc43
- https://git.kernel.org/stable/c/c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.