Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before 349df61526d2e39decc685d246202e3e284cfe05; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before 55b79b1ae42372012413ce0413181d26679b17ef; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before 5e9ee18b27fde88cb6148202b33916c66693fe82; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before 8767fe4079affa74314d7eb3220e700150289842; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before fda6573a46ad24f35348e024905ee5bdf729797e; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before 941d7394efda5e054e2d6f3e0dd0f6a9ba19aaa3; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before f9a0e4b61054cde89a2a77845293c726cc07cc43; affected af308b94a2a4a5a27bec9028354c4df444a7c8ba before c32b26aaa2f9216520a38b3f4bfeec846eb3eb8a |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.