CVE-2018-19964 — Time-of-check Time-of-use (TOCTOU) Race Condition in XEN

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition7 documents6 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 68.42%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
XENDebian XEN
Timeline
PublishedDec 8
Latest updateMay 13

Description

An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a denial of service (host OS hang) because the p2m lock remains unavailable indefinitely in certain error conditions.

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:HExploitability: 2.0 | Impact: 4.0

Affected Packages3 packages

▶debiandebian/xen< xen 4.11.1-1 (bookworm)
▶Debianxen/xen< 4.11.1-1+3
▶NVDxen/xen4.11.0 — 4.11.1

Patches

Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-5cpj-w97w-28px: An issue was discovered in Xen 4↗2022-05-13
▶
OSV
CVE-2018-19964: An issue was discovered in Xen 4↗2018-12-08
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📋Vendor Advisories

2
Red Hat
xen: x86: incorrect error handling for guest p2m page removals (XSA-277)↗2018-11-20
▶
Debian
CVE-2018-19964: xen - An issue was discovered in Xen 4.11.x allowing x86 guest OS users to cause a den...↗2018
▶

💬Community

2
Bugzilla
CVE-2018-19963 CVE-2018-19964 CVE-2018-19966 xen: various flaws [fedora-all]↗2018-11-21
▶
Bugzilla
CVE-2018-19964 xsa277 xen: x86: incorrect error handling for guest p2m page removals (XSA-277)↗2018-11-21
▶