CVE-2023-1295 Privilege escalation with IO_RING_OP_CLOSE in the Linux Kernel

2023-06-2811:08:54

CWE-367

Google

www.cve.org

privilege escalation

linux kernel

io_uring

time-of-check

time-of-use

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

7.6 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

A time-of-check to time-of-use issue exists in io_uring subsystem’s IORING_OP_CLOSE operation in the Linux kernel’s versions 5.6 - 5.11 (inclusive), which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in 9eac1904d3364254d622bf2c771c4f85cd435fc2, backported to stable in 788d0824269bef539fe31a785b1517882eafed93.

CNA Affected

[
  {
    "defaultStatus": "unaffected",
    "product": "Linux Kernel",
    "vendor": "Linux",
    "versions": [
      {
        "lessThanOrEqual": "5.11",
        "status": "affected",
        "version": "5.6",
        "versionType": "custom"
      }
    ]
  }
]