Filtered chain view: unlock the filter mutex on transaction parse failure

F-DCRLND-CHAINVIEW-DEADLOCK-001

Public snapshot: 7 Oct 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

—score not recorded

decred/dcrlndReported fixdecred/dcrlnd

Filtered chain view: unlock the filter mutex on transaction parse failure

Fixed in: Public fix committed 2026-05-04; first containing release not established

fixed publicly

details

Finding IDs: F-DCRLND-CHAINVIEW-DEADLOCK-001
Status: fixed publicly
Fixed in: Public fix committed 2026-05-04; first containing release not established
Recorded credit: Public fix author: Jamie Holdstock. Public 1seal credit and a causal link to our report are not established.
Note: The patch releases filterMtx before returning from the failed transaction decode in onBlockConnected, matching the error path in the earlier report. Reaching this path requires malformed data from the configured dcrd backend. Arbitrary remote triggering, inevitable loss of funds and an officially accepted security report are not claimed.

F-DCRLND-CHAINVIEW-DEADLOCK-001: Resource limits. An error return with the filter mutex still held can stall later chain-view operations. Reviewed 7 Oct 2026. Mechanism assessed by 1seal.

Mechanism source for F-DCRLND-CHAINVIEW-DEADLOCK-001

Security area (1seal assessment): Availability. An error return with the filter mutex still held can stall later chain-view operations. Reviewed 7 Oct 2026.

Clarify or correct this record privately. The email subject includes the finding ID. For an existing case, continue the agreed private thread. Do not post unpublished vulnerability details in public issues. Research disclosure policy.

How this page groups evidence

This identifier groups recorded evidence; it is not an additional CVE, independent-vulnerability count or guarantee of vendor confirmation. Fixed code, released versions, attribution and independent discovery are distinct claims. Absent metadata means not recorded, not disproved. Counting rules.