CVE-2022-2526

2022-09-0915:15:10

CWE-416

[email protected]

web.nvd.nist.gov

254

cve-2022-2526

use-after-free

systemd

vulnerability

dnsstream object

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

59.7%

JSON

A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in ‘resolved-dns-stream.c’ not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.

Affected configurations

Vulners

NVD

Node

systemd_projectsystemd

VendorProductVersionCPE
systemd_projectsystemd*cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
systemd_project	systemd	*	cpe:2.3:a:systemd_project:systemd::::::::

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "systemd-resolved",
    "versions": [
      {
        "version": "systemd 240",
        "status": "affected"
      }
    ]
  }
]