CVE-2019-11934
CVE-2019-11934 is a critical-severity vulnerability in Facebook Folly with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (75th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Facebook Folly
- Published:
- Last modified:
Description
Improper handling of close_notify alerts can result in an out-of-bounds read in AsyncSSLSocket. This issue affects folly prior to v2019.11.04.00.
Frequently asked questions
- What is CVE-2019-11934?
- Improper handling of close_notify alerts can result in an out-of-bounds read in AsyncSSLSocket. This issue affects folly prior to v2019.11.04.00.
- How severe is CVE-2019-11934?
- CVE-2019-11934 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-11934 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-11934?
- CVE-2019-11934 affects Facebook Folly. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-11934?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-11934 published?
- CVE-2019-11934 was published on 2019-12-04 and last updated on 2026-06-17.
References
- https://github.com/facebook/folly/commit/c321eb588909646c15aefde035fd3133ba32cdee
- https://www.facebook.com/security/advisories/cve-2019-11934
Affected products (1)
- cpe:2.3:a:facebook:folly:*:*:*:*:*:*:*:*
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