CVE-2019-1010299: The Rust Programming Language Standard Library 1.18.0 and later is affected by: CWE-200: Information Exposure

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MEDIUM 5.3REMOTEUPGRADE

CVE-2019-1010299 is a medium-severity flaw (CVSS 5.3) affecting rust. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Rust Programming Language Standard Library 1.18.0 and later is affected by: CWE-200: Information Exposure. The impact is: Contents of uninitialized memory could be printed to string or to log file. The component is: Debug trait implementation for std::collections::vec_deque::Iter. The attack vector is: The program needs to invoke debug printing for iterator over an empty VecDeque. The fixed version is: 1.30.0, nightly versions after commit b8

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-200, CWE-908
Published	2019-07-15
Last modified	2026-06-17

Publisher (CNA): DWF · Vendor: rust-lang

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

Am I affected?

Timeline

2019-07-15 18:15 UTCPublished CVE record published
2026-06-17 02:09 UTCUpdated Record last modified

rust-lang rust UPGRADE

Affected: >= 1.18.0 and < 1.30.0

Fixed in: 1.30.0

Safe to downgrade to: a release before 1.18.0

1. Check installed version

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

2. UPGRADE to 1.30.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rust

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 1.18.0 (Debian / Ubuntu)

apt-cache madison rust sudo apt install rust=<VERSION_BEFORE_1.18.0> sudo apt-mark hold rust

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

dnf --showduplicates list rust sudo dnf downgrade rust-<VERSION_BEFORE_1.18.0> sudo dnf versionlock add rust

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-2019-1010299?

rust: upgrade to 1.30.0. Exact commands for each OS are on this page.

Is CVE-2019-1010299 being exploited?

CVE-2019-1010299 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-2019-1010299 affect?

CVE-2019-1010299 affects rust. Severity is medium (CVSS 5.3). The Rust Programming Language Standard Library 1.18.0 and later is affected by: CWE-200: Information Exposure. The impact is: Contents of uninitialized memory could be printed to string or to log file. The component is: Debug trait implemen

How urgent is CVE-2019-1010299?

Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action

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References

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