CVE-2023-26253: In Gluster GlusterFS 11.0, there is an xlators/mount/fuse/src/fuse-bridge.c notify stack-based buffer over-rea

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HIGH 7.5REMOTEDOWNGRADE

CVE-2023-26253 is a high-severity flaw (CVSS 7.5) affecting glusterfs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Gluster GlusterFS 11.0, there is an xlators/mount/fuse/src/fuse-bridge.c notify stack-based buffer over-read.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-125
Published	2023-02-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gluster

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

Am I affected?

Timeline

2023-02-21 02:15 UTCPublished CVE record published
2026-06-17 05:42 UTCUpdated Record last modified

gluster glusterfs DOWNGRADE

Affected: 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 11.0 (Debian / Ubuntu)

apt-cache madison glusterfs sudo apt install glusterfs=<VERSION_BEFORE_11.0> sudo apt-mark hold glusterfs

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

dnf --showduplicates list glusterfs sudo dnf downgrade glusterfs-<VERSION_BEFORE_11.0> sudo dnf versionlock add glusterfs

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-2023-26253?

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

Is CVE-2023-26253 being exploited?

CVE-2023-26253 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-2023-26253 affect?

CVE-2023-26253 affects glusterfs. Severity is high (CVSS 7.5). In Gluster GlusterFS 11.0, there is an xlators/mount/fuse/src/fuse-bridge.c notify stack-based buffer over-read.

How urgent is CVE-2023-26253?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-48340 HIGH 7.5 DOWNGRADE In Gluster GlusterFS 11.0, there is an xlators/cluster/dht/src/dht-common.c dht_setxattr_mds_cbk use-after-fre

References

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