CVE-2022-35867: This vulnerability allows local attackers to escalate privileges on affected installations of xhyve

Routine

MEDIUM 6.7DOWNGRADE

CVE-2022-35867 is a medium-severity flaw (CVSS 6.7) affecting xhyve. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability allows local attackers to escalate privileges on affected installations of xhyve. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the e1000 virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.7 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-121
Published	2022-08-03
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: xhyve project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-08-03 16:15 UTCPublished CVE record published
2026-06-17 04:52 UTCUpdated Record last modified

xhyve project xhyve DOWNGRADE

Affected: 0.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.0

1. Check installed version

apt-cache policy xhyve || rpm -q xhyve || xhyve --version

2. No fixed release: DOWNGRADE to a release before 0.2.0 (Debian / Ubuntu)

apt-cache madison xhyve sudo apt install xhyve=<VERSION_BEFORE_0.2.0> sudo apt-mark hold xhyve

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xhyve sudo dnf downgrade xhyve-<VERSION_BEFORE_0.2.0> sudo dnf versionlock add xhyve

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-35867?

xhyve: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-35867 being exploited?

CVE-2022-35867 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-35867 affect?

CVE-2022-35867 affects xhyve. Severity is medium (CVSS 6.7). This vulnerability allows local attackers to escalate privileges on affected installations of xhyve. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability

How urgent is CVE-2022-35867?

Priority 30/100. No elevated risk signals yet.

Related CVEs

CVE-2022-36661 MEDIUM 6.5 DOWNGRADE xhyve commit dfbe09b was discovered to contain a NULL pointer dereference via the component vi_pci_read()
CVE-2022-36660 CRITICAL 9.8 DOWNGRADE xhyve commit dfbe09b was discovered to contain a stack buffer overflow via the component pci_vtrnd_notify().
CVE-2022-36659 MEDIUM 6.5 DOWNGRADE xhyve commit dfbe09b was discovered to contain a NULL pointer dereference via the component vi_pci_write()

References

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