CVE-2022-2602

Published Jan 8, 2024

Last updated 2 years ago

Overview

AI description

Automated description summarized from trusted sources.

CVE-2022-2602 is a use-after-free (UAF) vulnerability found within the Linux kernel's `io_uring` subsystem. This flaw arises from a race condition that occurs during the interaction between `io_uring` requests and the Unix socket garbage collector. Specifically, registered file descriptors can be prematurely freed by the Unix garbage collector while `io_uring` is still actively processing them, leading to memory corruption. This vulnerability impacts the registered file descriptor functionality in `io_uring`, allowing for a scenario where a freed file structure can be re-used with an `io_uring` operation. Attackers can exploit this by registering a file, having it freed by the Unix Garbage Collector, and then manipulating the system to reuse the freed memory, potentially with a different file, to achieve unintended write operations.

Description: io_uring UAF, Unix SCM garbage collection
Source: security@ubuntu.com
NVD status: Modified

Risk scores

CVSS 3.1

Type: Primary
Base score: 7
Impact score: 5.9
Exploitability score: 1
Vector string: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: HIGH

Weaknesses

security@ubuntu.com: CWE-416
nvd@nist.gov: CWE-416

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "D6F6A68F-EDF4-4E31-953F-740FCFBE5234",
            "versionEndIncluding": "6.0.19",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  },
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:esm:*:*:*",
            "matchCriteriaId": "B3293E55-5506-4587-A318-D1734F781C09",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
            "matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*",
            "matchCriteriaId": "359012F1-2C63-415A-88B8-6726A87830DE",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:o:canonical:ubuntu_linux:22.10:*:*:*:-:*:*:*",
            "matchCriteriaId": "47842532-D2B6-44CB-ADE2-4AC8630A4D8C",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.