CVE-2026-9080

UAF after pause in socket callback

HIGH
7.3
CVSS Score
Published: July 3, 2026 at 06:17 AM UTC
Updated: September 15, 2026 at 07:35 AM UTC
1 product affected across 1 vendorCurl

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Severity
HIGH7.3
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.

Affected

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

8.13.0 ≤ v < 8.14.28.13.0 ≤ v < 8.21.08.15.0 ≤ v < 8.16.18.17.0 ≤ v < 8.20.18.13.08.14.08.14.18.15.08.16.08.17.08.18.08.19.08.20.0cfc657a48dbafb4194676d4c9d841388b3a22210
Vendor states this is fixed in 5ab34cba42e4ee4282fe8bab43f311d51b9bf9bd (fixed)
Affected range stops below 8.14.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.16.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.20.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.21.0, 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:

References (3)

Vendor Advisory
Source: cverecord
https://curl.se/docs/CVE-2026-9080.json
PatchVendor Advisory
Source: cverecord
https://curl.se/docs/CVE-2026-9080.html
ExploitIssue TrackingThird Party Advisory
Source: cverecord
https://hackerone.com/reports/3749204

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

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

CVSS

7.3HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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