CVE-2023-50711: vmm-sys-util is a collection of modules that provides helpers and utilities used by multiple rust-vmm componen

Routine

MEDIUM 5.7UPGRADE

CVE-2023-50711 is a medium-severity flaw (CVSS 5.7) affecting vmm-sys-util. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

vmm-sys-util is a collection of modules that provides helpers and utilities used by multiple rust-vmm components. Starting in version 0.5.0 and prior to version 0.12.0, an issue in the `FamStructWrapper::deserialize` implementation provided by the crate for `vmm_sys_util::fam::FamStructWrapper` can lead to out of bounds memory accesses. The deserialization does not check that the length stored in the header matches the flexible array length. Mism

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.7 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-787
Published	2024-01-02
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: rust-vmm

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

Am I affected?

Timeline

2024-01-02 20:15 UTCPublished CVE record published
2026-06-17 06:39 UTCUpdated Record last modified

rust-vmm vmm-sys-util UPGRADE

Affected: >= 0.5.0 and < 0.12.0

Fixed in: 0.12.0

Safe to downgrade to: a release before 0.5.0

1. Check installed version

apt-cache policy vmm-sys-util || rpm -q vmm-sys-util || vmm-sys-util --version

2. UPGRADE to 0.12.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vmm-sys-util

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vmm-sys-util

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 0.5.0 (Debian / Ubuntu)

apt-cache madison vmm-sys-util sudo apt install vmm-sys-util=<VERSION_BEFORE_0.5.0> sudo apt-mark hold vmm-sys-util

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

dnf --showduplicates list vmm-sys-util sudo dnf downgrade vmm-sys-util-<VERSION_BEFORE_0.5.0> sudo dnf versionlock add vmm-sys-util

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-2023-50711?

vmm-sys-util: upgrade to 0.12.0. Exact commands for each OS are on this page.

Is CVE-2023-50711 being exploited?

CVE-2023-50711 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-2023-50711 affect?

CVE-2023-50711 affects vmm-sys-util. Severity is medium (CVSS 5.7). vmm-sys-util is a collection of modules that provides helpers and utilities used by multiple rust-vmm components. Starting in version 0.5.0 and prior to version 0.12.0, an issue in the `FamStructWrapper::deserialize` implementation provided

How urgent is CVE-2023-50711?

Priority 33/100. No elevated risk signals yet.

References

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