CVE-2023-50711

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 53% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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. Mismatch in the lengths might allow out of bounds memory access through Rust-safe methods. The issue was corrected in version 0.12.0 by inserting a check that verifies the lengths of compared flexible arrays are equal for any deserialized header and aborting deserialization otherwise. Moreover, the API was changed so that header length can only be modified through Rust-unsafe code. This ensures that users cannot trigger out-of-bounds memory access from Rust-safe code.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
47.4%
KEV
Not listed

Published

January 2, 2024

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Jun 27, 2026
Patch available. Sources: github_commit, github.
generic

[SECURITY] Fedora 38 Update: rust-virtio-queue-0.11.0-1.fc38 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YJI7D273R6G5RUC246KTI2YY3AXZKZMD/
generic

[SECURITY] Fedora 39 Update: rust-linux-loader-0.11.0-1.fc39 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W5XMCLV2P3ANS3XN4NXZTV4PUNTLWUNJ/
github Patch Available

`serde` deserialization for `FamStructWrapper` lacks bound checks that could potentially lead to out-of-bounds memory access · Advisory · rust-vmm/vmm-sys-util · GitHub

https://github.com/rust-vmm/vmm-sys-util/security/advisories/GHSA-875g-mfp6-g7f9
github_commit Patch Available

commit 30172fca2a8e (rust-vmm/vmm-sys-util)

Patch available: rust-vmm/vmm-sys-util v0.12.1 (contains commit 30172fca2a8e)

https://github.com/rust-vmm/vmm-sys-util/commit/30172fca2a8e0a38667d934ee56682247e13f167

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
vmm-sys-util—0.12.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:28 UTCEG score recompute
  3. 2026-07-22 23:15 UTCEG score recompute▲ 4.10
  4. 2026-07-22 14:06 UTCEPSS rescore
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  1. 2026-07-08 15:13 UTCEPSS rescore
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  17. 2026-06-27 00:39 UTCOSV refresh
  18. 2026-06-25 13:48 UTCEPSS rescore
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  20. 2026-06-24 14:04 UTCEPSS rescore
  21. 2026-06-24 14:04 UTCEPSS rescore
  22. 2026-06-24 06:36 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  23. 2026-06-23 21:31 UTCEPSS rescore
  24. 2026-06-23 21:31 UTCEPSS rescore
  25. 2026-06-22 14:24 UTCEPSS rescore
  26. 2026-06-22 14:24 UTCEPSS rescore
  27. 2026-06-21 14:55 UTCEPSS rescore
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  41. 2026-06-12 23:11 UTCEPSS rescore
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  43. 2026-06-11 13:59 UTCEPSS rescore
  44. 2026-06-10 22:17 UTCEPSS rescore
  45. 2026-06-10 13:21 UTCEPSS rescore
  46. 2026-06-09 10:56 UTCOSV refresh
  47. 2026-06-08 14:16 UTCEPSS rescore
  48. 2026-06-08 14:16 UTCEPSS rescore
  49. 2026-06-07 15:24 UTCEPSS rescore
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  75. 2026-05-26 07:18 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-50711?
CVE-2023-50711 is a critical vulnerability published on January 2, 2024. 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 vmmsysutil::fam::FamStructWrapper can lead…
When was CVE-2023-50711 disclosed?
CVE-2023-50711 was first published in the National Vulnerability Database on January 2, 2024, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-50711 actively exploited?
CVE-2023-50711 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-50711?
CVE-2023-50711 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-50711?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-50711, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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