CVE-2026-43084

HIGH EPSS 2.6%
Published May 6, 20261mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
2.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.12.75  –  <6.12.83
linuxlinux_kernel*≥6.18.14  –  <6.18.24
linuxlinux_kernel*≥6.19.4  –  <6.19.14

References 4

  • git.kernel.org https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f
    Patch