CVEvulnerability

CVE-2023-53566

5.5 MEDIUM Published 2025-10-04 Modified 2026-10-15 Official page ↗
Status
Modified
Published
2025-10-04
Last modified
2026-10-15
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-476

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 configurations

• linux linux kernel (>= 5.10.166 < 5.10.181) • linux linux kernel (>= 5.15.91 < 5.15.113) • linux linux kernel (>= 6.1.9 < 6.1.30) • linux linux kernel (>= 6.2.1 < 6.3.4) • linux linux kernel 6.2 • linux linux kernel 6.4

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References