Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were…
Priority LOW 37CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.
Why it matters now
EPSS 0.0193 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* | up to 0.2.8.8 | Vulnerable | torproject |
| cpe:2.3:a:torproject:tor:0.2.9.0:alpha:*:*:*:*:*:* | 0.2.9.0 alpha | Vulnerable | torproject |
| cpe:2.3:a:torproject:tor:0.2.9.1:alpha:*:*:*:*:*:* | 0.2.9.1 alpha | Vulnerable | torproject |
| cpe:2.3:a:torproject:tor:0.2.9.2:alpha:*:*:*:*:*:* | 0.2.9.2 alpha | Vulnerable | torproject |
| cpe:2.3:a:torproject:tor:0.2.9.3:alpha:*:*:*:*:*:* | 0.2.9.3 alpha | Vulnerable | torproject |
- cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:* Versions up to 0.2.8.8 Vulnerable ·torproject
- cpe:2.3:a:torproject:tor:0.2.9.0:alpha:*:*:*:*:*:* Versions 0.2.9.0 alpha Vulnerable ·torproject
- cpe:2.3:a:torproject:tor:0.2.9.1:alpha:*:*:*:*:*:* Versions 0.2.9.1 alpha Vulnerable ·torproject
- cpe:2.3:a:torproject:tor:0.2.9.2:alpha:*:*:*:*:*:* Versions 0.2.9.2 alpha Vulnerable ·torproject
- cpe:2.3:a:torproject:tor:0.2.9.3:alpha:*:*:*:*:*:* Versions 0.2.9.3 alpha Vulnerable ·torproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2016-8860
- 2026-10-03 Alias added: GHSA-r9f4-f6pw-gqm4
References
More torproject Tor vulnerabilities
- TI-2016-07433 Use after free in Mozilla Firefox KEVCVSS 3.1HIGH 7.5
- TI-2023-09419 The SafeSocks option in Tor before 0.4.7.13 has a logic error in which the unsafe SOCKS4… CVSS 3.1MEDIUM 6.5
- TI-2018-00448 Use after free in Tor CVSS 3.0HIGH 7.5
- TI-2026-54108 Race condition in torproject Tor CVSS 3.1CRITICAL 9.0
- TI-2026-54112 Out-of-bounds write in torproject Tor CVSS 3.1CRITICAL 9.3
- TI-2026-32508 Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell… CVSS 3.1CRITICAL 9.1
Sources
- CVE-2016-8860 · CVE Program
- CVE-2016-8860 · NVD
- FIRST EPSS
- GHSA-r9f4-f6pw-gqm4 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-8860 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences