CVE-2022-1055 Use after Free in tc_new_tfilter allowing for privilege escalation in Linux Kernel

2022-03-2915:05:13

CWE-416

Google

github.com

linux kernel

tc_new_tfilter

privilege escalation

use-after-free

cve-2022-1055

exploit

user namespaces

upgrade

commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5

CVSS4

8.6

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/SC:H/VI:H/SI:H/VA:N/SA:N

AI Score

6.8

Confidence

Low

SSVC

Exploitation

poc

Automatable

Technical Impact

total

JSON

A use-after-free exists in the Linux Kernel in tc_new_tfilter that could allow a local attacker to gain privilege escalation. The exploit requires unprivileged user namespaces. We recommend upgrading past commit 04c2a47ffb13c29778e2a14e414ad4cb5a5db4b5

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
    ],
    "vendor": "linux",
    "product": "linux_kernel",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "5.17_rc3",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]