CVE-2023-53566
netfilter: nft_set_rbtree: fix null deref on element insertion
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: fix null deref on element insertion There is no guarantee that rb_prev() will not return NULL in nft_rbtree_gc_elem(): general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] nft_add_set_elem+0x14b0/0x2990 nf_tables_newsetelem+0x528/0xb30 Furthermore, there is a possible use-after-free while iterating, 'node' can be free'd so we need to cache the next value to use.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 4, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
7ab87a326f20c52ff4d9972052d085be951c704b < b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 181859bdfb9734aca449512fccaee4cacce64aed < 899aa5638568abf5d69de7a7bb95e4615157375b 4aacf3d78424293e318c616016865380b37b9cc5 < 3fa13203b6d90cc3a33af47b058739f92ab82eef 2bf1435fa19d2c58054391b3bba40d5510a5758c < ec5caa765f7f6960011c919c9aeb1467940421f6 318cb24a4c3fce8140afaf84e4d45fcb76fb280b < a836be60a3aabcedcd9c79f545d409ace1f20ba6 c9e6978e2725a7d4b6cd23b2facd3f11422c0643 < a337706c1fb35aac3f26b48aca80421bdbe1d33a c9e6978e2725a7d4b6cd23b2facd3f11422c0643 < 61ae320a29b0540c16931816299eb86bf2b66c08
Linux / Linux
6.2
References
git.kernel.org: https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 git.kernel.org: https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b git.kernel.org: https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef git.kernel.org: https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6 git.kernel.org: https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6 git.kernel.org: https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a git.kernel.org: https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08