CVE-2023-53566

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef	Patch
https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08	Patch
https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b	Patch
https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a	Patch
https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6	Patch
https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56	Patch
https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.2:-::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc6::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc7::::::
	cpe:2.3:o:linux:linux_kernel:6.2:rc8::::::
	cpe:2.3:o:linux:linux_kernel:6.4:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.4:rc2::::::

History

No history.

Information

Published : 2025-10-04 16:15

Updated : 2026-03-21 00:42

NVD link : CVE-2023-53566

Mitre link : CVE-2023-53566

CVE.ORG link : CVE-2023-53566

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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