CVE-2018-12633

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Source
https://cve.org/CVERecord?id=CVE-2018-12633
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12633.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-12633
Downstream
Published
2018-06-22T00:29:00.270Z
Modified
2026-03-14T14:32:13.649480Z
Severity
  • 6.3 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in the Linux kernel through 4.17.2. vbgmiscdeviceioctl() in drivers/virt/vboxguest/vboxguestlinux.c reads the same user data twice with copyfromuser. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.sizein and hdr.sizeout) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage.

References

Affected packages

Git /

Affected ranges

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12633.json"
unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "4.17.2"
            }
        ]
    }
]