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CVE-2022-42320: debian debian_linux Incomplete Cleanup

Modified
AliasesALPINE-CVE-2022-42320UBUNTU-CVE-2022-42320DEBIAN-CVE-2022-42320
Published 01-11-2022Last modified 20-11-2024

Vulnerability summary

CVE-2022-42320 is a high (CVSS 7.0) Incomplete Cleanup vulnerability in debian debian_linux. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 22.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.0/10
010
High · v3.1 (NVD)
EPSS score
0.30%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 9
DSA-5272-1SUSE-SU-2022:3925-1SUSE-SU-2022:3928-1SUSE-SU-2022:3947-1SUSE-SU-2022:3960-1SUSE-SU-2022:3971-1

Timeline

  1. 01-11-2022
    PublishedVulnerability first disclosed.
  2. 20-11-2024
    Last modifiedVulnerability information updated.

Description

Xenstore: Guests can get access to Xenstore nodes of deleted domains Access rights of Xenstore nodes are per domid. When a domain is gone, there might be Xenstore nodes left with access rights containing the domid of the removed domain. This is normally no problem, as those access right entries will be corrected when such a node is written later. There is a small time window when a new domain is created, where the access rights of a past domain with the same domid as the new one will be regarded to be still valid, leading to the new domain being able to get access to a node which was meant to be accessible by the removed domain. For this to happen another domain needs to write the node before the newly created domain is being introduced to Xenstore by dom0.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.28% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian2 products
Alpine1 product
  • xen< 4.15.4-r0 | < 4.16.3-r0 | < 4.17.0-r0
Fedoraproject1 product
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product

5 vendors · 6 products

References

13 links
Show all 13 references