CVE-2024-52920: Bitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (infinite loop) via a malforme

Q: How do I fix CVE-2024-52920?

bitcoin core: upgrade to 0.20.0. Exact commands for each OS are on this page.

Q: Is CVE-2024-52920 being exploited?

CVE-2024-52920 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-2024-52920 affect?

CVE-2024-52920 affects bitcoin core. Severity is high (CVSS 7.5). Bitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed GETDATA message.

Q: How urgent is CVE-2024-52920?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2024-52920 is a high-severity flaw (CVSS 7.5) affecting bitcoin core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Bitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed GETDATA message.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-770
Published	2024-11-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bitcoin

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

Am I affected?

Timeline

2024-11-18 04:15 UTCPublished CVE record published
2026-06-17 08:07 UTCUpdated Record last modified

bitcoin bitcoin core UPGRADE

Affected: < 0.20.0

Fixed in: 0.20.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bitcoin-core || rpm -q bitcoin-core || bitcoin-core --version

2. UPGRADE to 0.20.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bitcoin-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bitcoin-core

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-2024-52920?

bitcoin core: upgrade to 0.20.0. Exact commands for each OS are on this page.

Is CVE-2024-52920 being exploited?

CVE-2024-52920 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-2024-52920 affect?

CVE-2024-52920 affects bitcoin core. Severity is high (CVSS 7.5). Bitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed GETDATA message.

How urgent is CVE-2024-52920?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-54605 HIGH 7.5 UPGRADE Bitcoin Core through 29.0 allows Uncontrolled Resource Consumption (issue 2 of 2).
CVE-2025-54604 HIGH 7.5 UPGRADE Bitcoin Core through 29.0 allows Uncontrolled Resource Consumption (issue 1 of 2).
CVE-2025-46598 MEDIUM 5.3 UPGRADE Bitcoin Core through 29.0 allows a denial of service via a crafted transaction.
CVE-2025-46597 HIGH 7.5 UPGRADE Bitcoin Core 0.13.0 through 29.x has an integer overflow.
CVE-2024-55563 MEDIUM 5.3 UPGRADE Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue t

References

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