LOWVulnerability
CVE-2026-77640
tor before 0.4.9.9 was prone to an infinite loop when decompressing a truncated zlib/gzip stream with done=1. A truncated stream never reaches Z_STREAM_END, causing zlib to return Z_BUF_ERROR with no input remaining, which buf_add_compress() mistook for a full output buffer and retried forever. Fixed by returning TOR_COMPRESS_ERROR in that case so the caller can abort cleanly. This is TROVE-2026-021.
Properties
- severity
- LOW
- score
- 3.7
- epss_score
- 0.00215
- cve_id
- CVE-2026-77640
- vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- published_at
- 2026-08-20T21:17:11.373
- last_modified
- 2026-09-03T17:37:43.450
- epss_percentile
- 0.11775
Related Entities (3)
ENRICHED_BY (1)
→[Source]FIRST EPSS
HAS_WEAKNESS (1)
→[Weakness]Improper Validation of Specified Quantity in Input
DESCRIBED_BY (1)
→[Source]NVD
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