CVE-2018-10689: blktrace (aka Block IO Tracing) 1.2.0, as used with the Linux kernel and Android, has a buffer overflow in the

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MEDIUM 5.5WATCHLISTDOWNGRADEDOWNGRADE

CVE-2018-10689 is a medium-severity flaw (CVSS 5.5) affecting blktrace, blktrace. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

blktrace (aka Block IO Tracing) 1.2.0, as used with the Linux kernel and Android, has a buffer overflow in the dev_map_read function in btt/devmap.c because the device and devno arrays are too small, as demonstrated by an invalid free when using the btt program with a crafted file.

Why this priority

On your watchlist

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.9% (top 21%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-05-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: blktrace project

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

Am I affected?

Timeline

2018-05-03 07:29 UTCPublished CVE record published
2026-06-17 01:34 UTCUpdated Record last modified

blktrace project blktrace DOWNGRADE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.0 (Debian / Ubuntu)

apt-cache madison blktrace sudo apt install blktrace=<VERSION_BEFORE_1.2.0> sudo apt-mark hold blktrace

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

dnf --showduplicates list blktrace sudo dnf downgrade blktrace-<VERSION_BEFORE_1.2.0> sudo dnf versionlock add blktrace

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.

blktrace project blktrace DOWNGRADE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.0 (Debian / Ubuntu)

apt-cache madison blktrace sudo apt install blktrace=<VERSION_BEFORE_1.2.0> sudo apt-mark hold blktrace

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

dnf --showduplicates list blktrace sudo dnf downgrade blktrace-<VERSION_BEFORE_1.2.0> sudo dnf versionlock add blktrace

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-2018-10689?

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

Is CVE-2018-10689 being exploited?

CVE-2018-10689 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-2018-10689 affect?

CVE-2018-10689 affects blktrace, blktrace. Severity is medium (CVSS 5.5). blktrace (aka Block IO Tracing) 1.2.0, as used with the Linux kernel and Android, has a buffer overflow in the dev_map_read function in btt/devmap.c because the device and devno arrays are too small, as demonstrated by an invalid free when

How urgent is CVE-2018-10689?

Priority 44/100. On your watchlist

Software pages

Linux kernel vulnerabilities · Android vulnerabilities

References

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