CVE-2023-38039

HIGH
7.5
CVSS Score
Published: September 15, 2023 at 03:21 AM UTC
Updated: June 17, 2026 at 06:09 AM UTC
10 products affected across 3 vendorsWindows Server 2019Windows 10 1809Fedora

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Severity
HIGH7.5
Exploit prediction
EPSS 56%
SSVC
PoC

Description

When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API. However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.

Affected

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

v < 8.3.07.84.0 ≤ v < 8.3.0
Vendor states this is fixed in 7.84.0 (unaffected)
Affected range stops below 8.3.0, so it looks safe — our inference, not a vendor statement
v < 10.0.17763.5122
Affected range stops below 10.0.17763.5122, so it looks safe — our inference, not a vendor statement
v < 10.0.19044.3693
Affected range stops below 10.0.19044.3693, so it looks safe — our inference, not a vendor statement
v < 10.0.19045.3693
Affected range stops below 10.0.19045.3693, so it looks safe — our inference, not a vendor statement
v < 10.0.22000.2600
Affected range stops below 10.0.22000.2600, so it looks safe — our inference, not a vendor statement
v < 10.0.22621.2715
Affected range stops below 10.0.22621.2715, so it looks safe — our inference, not a vendor statement
v < 10.0.22631.2715
Affected range stops below 10.0.22631.2715, so it looks safe — our inference, not a vendor statement
v < 10.0.17763.5122
Affected range stops below 10.0.17763.5122, so it looks safe — our inference, not a vendor statement
v < 10.0.20348.2113
Affected range stops below 10.0.20348.2113, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

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

Patch and advisory references

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

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