CVE-2005-2876: umount in util-linux 2.8 to 2.12q, 2.13-pre1, and 2.13-pre2, and other packages such as loop-aes-utils, allows

Routine

HIGH 7.2WATCHLISTDOWNGRADE

CVE-2005-2876 is a high-severity flaw (CVSS 7.2) affecting util-linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

umount in util-linux 2.8 to 2.12q, 2.13-pre1, and 2.13-pre2, and other packages such as loop-aes-utils, allows local users with unmount permissions to gain privileges via the -r (remount) option, which causes the file system to be remounted with just the read-only flag, which effectively clears the nosuid, nodev, and other flags.

Why this priority

High severity
On your watchlist

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Published	2005-09-13
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: andries brouwer

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-09-13 23:03 UTCPublished CVE record published
2026-06-16 22:15 UTCUpdated Record last modified

andries brouwer util-linux DOWNGRADE

Affected: 2.8.1_alpha · 2.8_12 · 2.9i · 2.9w · 2.10f · 2.10m · 2.10p · 2.11f

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.8.1_alpha

1. Check installed version

apt-cache policy util-linux || rpm -q util-linux || util-linux --version

2. No fixed release: DOWNGRADE to a release before 2.8.1_alpha (Debian / Ubuntu)

apt-cache madison util-linux sudo apt install util-linux=<VERSION_BEFORE_2.8.1_alpha> sudo apt-mark hold util-linux

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

dnf --showduplicates list util-linux sudo dnf downgrade util-linux-<VERSION_BEFORE_2.8.1_alpha> sudo dnf versionlock add util-linux

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-2005-2876?

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

Is CVE-2005-2876 being exploited?

CVE-2005-2876 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-2005-2876 affect?

CVE-2005-2876 affects util-linux. Severity is high (CVSS 7.2). umount in util-linux 2.8 to 2.12q, 2.13-pre1, and 2.13-pre2, and other packages such as loop-aes-utils, allows local users with unmount permissions to gain privileges via the -r (remount) option, which causes the file system to be remounted

How urgent is CVE-2005-2876?

Priority 39/100. High severity; On your watchlist

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References

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