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CVE-2019-11940

CRITICAL
9.8
CVSS Score
Published: December 4, 2019 at 04:30 PM UTC
Updated: June 17, 2026 at 02:13 AM UTC
1 product affected across 1 vendorProxygen

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%

Description

In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations can place the header table into a corrupted state, leading to a use-after-free condition and undefined behavior. This issue affects Proxygen from v0.29.0 until v2017.04.03.00.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Proxygen· Proxygen Project
95%
v ≥ v0.29.00.29.0 ≤ v ≤ 2017.04.03.000.29.02017.04.03.00
Vendor states this is fixed in v0.29.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/facebook/proxygen/commit/f43b134cc5c19d8532e7fb670a1c02e85f7a8d4f
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://www.facebook.com/security/advisories/cve-2019-11940

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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