CVE-2020-11105

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 33% 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: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue was discovered in USC iLab cereal through 1.3.0. It employs caching of std::shared_ptr values, using the raw pointer address as a unique identifier. This becomes problematic if an std::shared_ptr variable goes out of scope and is freed, and a new std::shared_ptr is allocated at the same address. Serialization fidelity thereby becomes dependent upon memory layout. In short, serialized std::shared_ptr variables cannot always be expected to serialize back into their original values. This can have any number of consequences, depending on the context within which this manifests.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
78.4%
KEV
Not listed

Published

March 30, 2020

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Jul 6, 2026
No patch confirmed yet.
generic

std::shared_ptr serialization asymmetry (depends on memory layout) · Issue #636 · USCiLab/cereal · GitHub

https://github.com/USCiLab/cereal/issues/636

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 42× 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.

  1. 2026-07-22 14:05 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2020-11105?
CVE-2020-11105 is a critical vulnerability published on March 30, 2020. An issue was discovered in USC iLab cereal through 1.3.0. It employs caching of std::sharedptr values, using the raw pointer address as a unique identifier. This becomes problematic if an std::sharedptr variable goes out of scope and is freed, and a new std::sharedptr is allocated at the same…
When was CVE-2020-11105 disclosed?
CVE-2020-11105 was first published in the National Vulnerability Database on March 30, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-11105 actively exploited?
CVE-2020-11105 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-11105?
CVE-2020-11105 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-11105?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-11105, 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.

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