CVE-2023-53566 - netfilter: nft_set_rbtree: fix null deref on element insertion

CVE-2023-53566 - netfilter: nft_set_rbtree: fix null deref on element insertion

https://cvefeed.io/rssfeed/latest.atom / Sat, 10/04/2025 - 17:42
CVE ID : CVE-2023-53566
Published : Oct. 4, 2025, 3:17 p.m. | 25 minutes ago
Description : 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.
Severity: 0.0 | NA
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