CVE-2022-42327 json
x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and wr…
published 2022-11-01 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-45402
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.
Patch / fix
- xen Debian 14, Debian 13, Debian 12 4.16.2+90-g0d39a6d1ae-1
debian advisories DEBIAN-CVE-2022-42327
- xen SLE Module for Server Applications 15 SP4, SLE Module for Basesystem 15 SP4, SLE Micro 5.3 +1 more 4.16.2_08-150400.4.16.1
suse advisories SUSE-SU-2022:4007-1
- xen Alpine 3.15, Alpine 3.14 4.15.4-r0
- xen Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 4.16.2-r1
alpine advisories ALPINE-CVE-2022-42327
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 18 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
Affected products
- Xen xen
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
xenbits.xen.org
/xsa/advisory-412.html
patch, vendor-advisory
-
openwall.com
/lists/oss-security/2022/11/01/3
mailing-list, patch, third-party-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
vendor-advisory
-
security.gentoo.org
/glsa/202402-07
vendor-advisory
-
xenbits.xenproject.org
/xsa/advisory-412.txt
vendor-advisory
Sources
- CVE List CVE-2022-42327
- NVD CVE-2022-42327
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.