CVE-2022-47022: An issue was discovered in open-mpi hwloc 2.1.0 allows attackers to cause a denial of service or other unspeci

Routine

MEDIUM 4.7UPGRADE

CVE-2022-47022 is a medium-severity flaw (CVSS 4.7) affecting hwloc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in open-mpi hwloc 2.1.0 allows attackers to cause a denial of service or other unspecified impacts via glibc-cpuset in topology-linux.c.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-476
Published	2023-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: open-mpi

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

Am I affected?

Timeline

2023-08-22 19:16 UTCPublished CVE record published
2026-06-17 05:12 UTCUpdated Record last modified

open-mpi hwloc UPGRADE

Affected: >= 2.1.0 and <= 2.9.2

Fixed in: newer than 2.9.2

Safe to downgrade to: a release before 2.1.0

1. Check installed version

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

2. UPGRADE to newer than 2.9.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hwloc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hwloc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.1.0 (Debian / Ubuntu)

apt-cache madison hwloc sudo apt install hwloc=<VERSION_BEFORE_2.1.0> sudo apt-mark hold hwloc

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hwloc sudo dnf downgrade hwloc-<VERSION_BEFORE_2.1.0> sudo dnf versionlock add hwloc

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-2022-47022?

hwloc: upgrade to newer than 2.9.2. Exact commands for each OS are on this page.

Is CVE-2022-47022 being exploited?

CVE-2022-47022 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-2022-47022 affect?

CVE-2022-47022 affects hwloc. Severity is medium (CVSS 4.7). An issue was discovered in open-mpi hwloc 2.1.0 allows attackers to cause a denial of service or other unspecified impacts via glibc-cpuset in topology-linux.c.

How urgent is CVE-2022-47022?

Priority 27/100. Public exploit reference

Software pages

glibc vulnerabilities

References

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