CVE-2018-10861: A flaw was found in the way ceph mon handles user requests

This month

HIGH 8.1WATCHLISTDOWNGRADEDOWNGRADEDOWNGRADE

CVE-2018-10861 is a high-severity flaw (CVSS 8.1) affecting ceph, ceph storage, ceph storage mon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in the way ceph mon handles user requests. Any authenticated ceph user having read access to ceph can delete, create ceph storage pools and corrupt snapshot images. Ceph branches master, mimic, luminous and jewel are believed to be affected.

Why this priority

High severity
On your watchlist

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

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-285, CWE-287
Published	2018-07-10
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: ceph · redhat

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

Am I affected?

Timeline

2018-07-10 14:29 UTCPublished CVE record published
2026-06-17 01:34 UTCUpdated Record last modified

ceph ceph DOWNGRADE

Affected: 10.2.0 · 10.2.1 · 10.2.2 · 10.2.3 · 10.2.4 · 10.2.5 · 10.2.6 · 10.2.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 10.2.0 (Debian / Ubuntu)

apt-cache madison ceph sudo apt install ceph=<VERSION_BEFORE_10.2.0> sudo apt-mark hold ceph

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

dnf --showduplicates list ceph sudo dnf downgrade ceph-<VERSION_BEFORE_10.2.0> sudo dnf versionlock add ceph

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.

redhat ceph storage DOWNGRADE

Affected: 3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3

1. Check installed version

apt-cache policy ceph-storage || rpm -q ceph-storage || ceph-storage --version

2. No fixed release: DOWNGRADE to a release before 3 (Debian / Ubuntu)

apt-cache madison ceph-storage sudo apt install ceph-storage=<VERSION_BEFORE_3> sudo apt-mark hold ceph-storage

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

dnf --showduplicates list ceph-storage sudo dnf downgrade ceph-storage-<VERSION_BEFORE_3> sudo dnf versionlock add ceph-storage

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.

redhat ceph storage mon DOWNGRADE

Affected: 2 · 3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2

1. Check installed version

apt-cache policy ceph-storage-mon || rpm -q ceph-storage-mon || ceph-storage-mon --version

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

apt-cache madison ceph-storage-mon sudo apt install ceph-storage-mon=<VERSION_BEFORE_2> sudo apt-mark hold ceph-storage-mon

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

dnf --showduplicates list ceph-storage-mon sudo dnf downgrade ceph-storage-mon-<VERSION_BEFORE_2> sudo dnf versionlock add ceph-storage-mon

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.

redhat ceph storage osd DOWNGRADE

Affected: 2 · 3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2

1. Check installed version

apt-cache policy ceph-storage-osd || rpm -q ceph-storage-osd || ceph-storage-osd --version

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

apt-cache madison ceph-storage-osd sudo apt install ceph-storage-osd=<VERSION_BEFORE_2> sudo apt-mark hold ceph-storage-osd

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

dnf --showduplicates list ceph-storage-osd sudo dnf downgrade ceph-storage-osd-<VERSION_BEFORE_2> sudo dnf versionlock add ceph-storage-osd

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.

redhat enterprise linux desktop MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux server MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2018-10861?

ceph: downgrade or apply the listed mitigation; ceph storage: downgrade or apply the listed mitigation; ceph storage mon: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-10861 being exploited?

CVE-2018-10861 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-2018-10861 affect?

CVE-2018-10861 affects ceph, ceph storage, ceph storage mon. Severity is high (CVSS 8.1). A flaw was found in the way ceph mon handles user requests. Any authenticated ceph user having read access to ceph can delete, create ceph storage pools and corrupt snapshot images. Ceph branches master, mimic, luminous and jewel are believ

How urgent is CVE-2018-10861?

Priority 55/100. High severity; On your watchlist

Software pages

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CVE-2021-3531 MEDIUM 5.3 UPGRADE DOWNGRADE A flaw was found in the Red Hat Ceph Storage RGW in versions before 14.2.21
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References

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