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.
Affected products
linux: linux kernel
References7
- git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef Patch
- git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08 Patch
- git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b Patch
- git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a Patch
- git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6 Patch
- git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 Patch
- git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 4 · as of 9 November 2026
- CWE
- CWE-476
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