CVE-2019-25220 json
Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains…
published 2024-11-18 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2019-19368
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains (aka a "Chain Width Expansion" attack) because a node does not first verify that a presented chain has enough work before committing to store it.
Patch / fix
- bitcoin bitcoin_core 24.0.1
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 23 mo ago
Exploit prediction
0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- bitcoin bitcoin_core
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
bitcoincore.org
/en/2024/09/18/disclose-headers-oom
vendor-advisory
-
en.bitcoin.it
/wiki/Common_Vulnerabilities_and_Exposures
third-party-advisory
-
lists.linuxfoundation.org
/pipermail/bitcoin-dev/2019-October/017354.html
mailing-list
Sources
- CVE List CVE-2019-25220
- NVD CVE-2019-25220
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.