What’s Vulnerable › Vulnerabilities
CVE-2021-41593
- Severity: high (CVSS 8.6 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2021-10-04 · updated 2026-06-17
- Weakness: CWE-770
Description
Lightning Labs lnd before 0.13.3-beta allows loss of funds because of dust HTLC exposure.
Affected products
- Lightning Network Daemon Project Lightning Network Daemon: before 0.11.0; 0.11.0, 0.11.0-beta, 0.11.0-beta_rc1, 0.11.0-beta_rc2, 0.11.0-beta_rc3, 0.11.0-beta_rc4 (+31) — fixed in 0.11.0
How to fix
Upgrade to a fixed version: Lightning Network Daemon Project Lightning Network Daemon 0.11.0. Check the vendor advisory for mitigations.
References
- https://bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixing
- https://github.com/lightningnetwork/lnd/blob/master/docs/release-notes/release-notes-0.13.3.md
- https://github.com/lightningnetwork/lnd/releases/tag/v0.13.3-beta
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.html
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003257.html
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003264.html
- https://bitcoinmagazine.com/technical/good-griefing-a-lingering-vulnerability-on-lightning-network-that-still-needs-fixing
- https://github.com/lightningnetwork/lnd/blob/master/docs/release-notes/release-notes-0.13.3.md
- https://github.com/lightningnetwork/lnd/releases/tag/v0.13.3-beta
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2020-May/002714.html
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003257.html
- https://lists.linuxfoundation.org/pipermail/lightning-dev/2021-October/003264.html
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