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CVE-2011-0491
The tor_realloc function in Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha does not validate a certain size value during memory…
Medium5.0EPSS 2.5%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The tor_realloc function in Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha does not validate a certain size value during memory allocation, which might allow remote attackers to cause a denial of service (daemon crash) via unspecified vectors, related to "underflow errors."
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
- EPSS (exploitation in 30 days)
- 2.5% · top 15% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Weakness
Affected products
n/a
- affected n/a
References (6)
- [or-announce] 20110117 Tor 0.2.1.29 is released (security patches) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://gitweb.torproject.org/tor.git/blob/refs/heads/release-0.2.2:/ChangeLog (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://trac.torproject.org/projects/tor/ticket/2324 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://blog.torproject.org/blog/tor-02129-released-security-patches (opens in a new tab)x_refsource_CONFIRMx_transferred
- tor-torrealloc-dos(64888) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 45953 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .