CVE-2023-53566

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

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

06 Feb 2026, 14:32

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef - () https://git.kernel.org/stable/c/3fa13203b6d90cc3a33af47b058739f92ab82eef - Patch
References () https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08 - () https://git.kernel.org/stable/c/61ae320a29b0540c16931816299eb86bf2b66c08 - Patch
References () https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b - () https://git.kernel.org/stable/c/899aa5638568abf5d69de7a7bb95e4615157375b - Patch
References () https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a - () https://git.kernel.org/stable/c/a337706c1fb35aac3f26b48aca80421bdbe1d33a - Patch
References () https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6 - () https://git.kernel.org/stable/c/a836be60a3aabcedcd9c79f545d409ace1f20ba6 - Patch
References () https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 - () https://git.kernel.org/stable/c/b76db53ee8802ee5683f8cb401d7e2ec6f9b3d56 - Patch
References () https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6 - () https://git.kernel.org/stable/c/ec5caa765f7f6960011c919c9aeb1467940421f6 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux
Linux linux Kernel
CWE CWE-476
CPE cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*

04 Oct 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-10-04 16:15

Updated : 2026-02-06 14:32

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