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CVE-2026-4271

nvd nist
Published: Mar 17, 2026Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

Description

A flaw was found in libsoup, a library for handling HTTP requests. This vulnerability, known as a Use-After-Free, occurs in the HTTP/2 server implementation. A remote attacker can exploit this by sending specially crafted HTTP/2 requests that cause authentication failures. This can lead to the application attempting to access memory that has already been freed, potentially causing application instability or crashes, resulting in a Denial of Service (DoS).

Affected (6)

Gnome
1 product
Libsoup
Redhat
1 product
Enterprise Linux
Configuration A
6 vulnerable
Vulnerable SoftwareAffected Versions
Libsoup
All versions
Redhat
Enterprise Linux
Version 10.0
Enterprise Linux
Version 6.0
Enterprise Linux
Version 7.0
Enterprise Linux
Version 8.0
Enterprise Linux
Version 9.0

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (7)

Source: secalert@redhat.com
Source: secalert@redhat.com
Source: secalert@redhat.com
Source: secalert@redhat.com
Vendor Advisory
Source: secalert@redhat.com
Issue TrackingVendor Advisory
Source: secalert@redhat.com
ExploitIssue TrackingVendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
ExploitIssue TrackingVendor Advisory

Timeline

No history available yet.