Infinite Loop in Tor Decompression Leads to DoS
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| torproject | Tor | unaffected |
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No data.
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| Torproject | Tor |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.378% probability within 30 days)
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| Metrics |
ssvc
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| Title | Infinite Loop in Tor Decompression Leads to DoS |
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| Description | 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. | |
| First Time appeared |
Torproject
Torproject tor |
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| Weaknesses | CWE-1284 | |
| CPEs | cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Torproject
Torproject tor |
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| References |
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| Metrics |
cvssV3_1
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