Back
CVE-2020-1916
An incorrect size calculation in ldap_escape may lead to an integer overflow when overly long input is passed in, resulting in an…
Critical9.8EPSS 1.4%
- Published
- Updated
- Reserved
- Assigned by
Description
An incorrect size calculation in ldap_escape may lead to an integer overflow when overly long input is passed in, resulting in an out-of-bounds write. This issue affects HHVM prior to 4.56.2, all versions between 4.57.0 and 4.78.0, 4.79.0, 4.80.0, 4.81.0, 4.82.0, 4.83.0.
Timeline
ID reserved
By facebook
- 15 months later
· 15 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.4% · top 28% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
- unaffected 4.83.1 – < unspecified
- affected 4.83.0
- unaffected 4.82.1 – < unspecified
- affected 4.82.0
- unaffected 4.81.1 – < unspecified
- affected 4.81.0
- unaffected 4.80.1 – < unspecified
- affected 4.80.0
- unaffected 4.79.1 – < unspecified
- affected 4.79.0
- unaffected 4.78.1 – < unspecified
- affected 4.57.0 – < unspecified
- unaffected 4.56.2 – < unspecified
- affected unspecified – < 4.56.2
References (2)
- https://hhvm.com/blog/2020/11/12/security-update.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4 (opens in a new tab)x_refsource_MISCx_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)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-1916)Record last updated .