CVE-2023-4244 Use-after-free in Linux kernel's netfilter: nf_tables component

2023-09-0613:53:24

CWE-416

Google

www.cve.org

linux kernel

netfilter

nf_tables

vulnerability

local privilege escalation

race condition

reference counter

upgrade

commit 3e91b0ebd994635df2346353322ac51ce84ce6d8

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.8 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

A use-after-free vulnerability in the Linux kernel’s netfilter: nf_tables component can be exploited to achieve local privilege escalation.

Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.

We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.

CNA Affected

[
  {
    "vendor": "Linux",
    "product": "Kernel",
    "packageName": "kernel",
    "repo": "https://git.kernel.org",
    "versions": [
      {
        "status": "affected",
        "version": "0.0",
        "lessThan": "6.5",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]