Home/CVE/Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might n
CVE

CVE-2022-42319

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might n

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page.

Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) of xenstored.

MEDIUM · CVSS 6.5 EPSS 0.00029
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-401Missing Release of Memory after Effective Lifetime
▤

Affected Products & Versions

3
xen>= 4.9.0
debian linuxall versions
fedoraproject fedoraall versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · security@xen.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Nov 2022 · 01:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
⚑

Vendor Advisories

8
suse-csafSUSE-SU-2022:4332-1
suse-csafSUSE-SU-2022:4241-1
suse-csafSUSE-SU-2022:4007-1
suse-csafSUSE-SU-2022:3971-1
suse-csafSUSE-SU-2022:3947-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2022/11/01/6Mailing ListThird Party Advisory
http://xenbits.xen.org/xsa/advisory-416.htmlPatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
https://security.gentoo.org/glsa/202402-07
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