CVE-2023-2612 shiftfs lock unbalance in Ubuntu-specific kernels

2023-05-3023:12:29

CWE-667

canonical

www.cve.org

cve-2023-2612

shiftfs

ubuntu-specific kernels

race condition

inode locking

denial of service

kernel deadlock

4.4 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).

CNA Affected

[
  {
    "collectionURL": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/kinetic/refs/",
    "packageName": "ubuntu-linux",
    "platforms": [
      "Linux"
    ],
    "product": "ubuntu-linux",
    "repo": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/kinetic/",
    "vendor": "Canonical Ltd.",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "02b47547824b1cd0d55c6744f91886f04de8947e",
        "versionType": "commit"
      }
    ]
  }
]