CVE-2020-11104: An issue was discovered in USC iLab cereal through 1.3.0

Q: How do I fix CVE-2020-11104?

cereal: upgrade to newer than 1.3.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-11104 being exploited?

CVE-2020-11104 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-11104 affect?

CVE-2020-11104 affects cereal. Severity is medium (CVSS 5.3). An issue was discovered in USC iLab cereal through 1.3.0. Serialization of an (initialized) C/C++ long double variable into a BinaryArchive or PortableBinaryArchive leaks several bytes of stack or heap memory, from which sensitive informati

Q: How urgent is CVE-2020-11104?

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

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2020-11104 is a medium-severity flaw (CVSS 5.3) affecting cereal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in USC iLab cereal through 1.3.0. Serialization of an (initialized) C/C++ long double variable into a BinaryArchive or PortableBinaryArchive leaks several bytes of stack or heap memory, from which sensitive information (such as memory layout or private keys) can be gleaned if the archive is distributed outside of a trusted context.

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	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-908
Published	2020-03-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: usc

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

Am I affected?

Timeline

2020-03-30 22:15 UTCPublished CVE record published
2026-06-17 02:49 UTCUpdated Record last modified

usc cereal UPGRADE

Affected: <= 1.3.0

Fixed in: newer than 1.3.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.3.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cereal

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2020-11104?

cereal: upgrade to newer than 1.3.0. Exact commands for each OS are on this page.

Is CVE-2020-11104 being exploited?

CVE-2020-11104 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-2020-11104 affect?

CVE-2020-11104 affects cereal. Severity is medium (CVSS 5.3). An issue was discovered in USC iLab cereal through 1.3.0. Serialization of an (initialized) C/C++ long double variable into a BinaryArchive or PortableBinaryArchive leaks several bytes of stack or heap memory, from which sensitive informati

How urgent is CVE-2020-11104?

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

Related CVEs

CVE-2020-11105 CRITICAL 9.8 UPGRADE An issue was discovered in USC iLab cereal through 1.3.0

References

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