CVE-2026-15711: Allocation of Resources Without Limits or Throttling in Red Hat Red Hat Enterprise Linux 10
CVE-2026-15711 is a vulnerability in libsoup's WebSocket frame parsing in Red Hat Enterprise Linux 10. The library does not properly enforce the RFC 6455 §5.5 length limit for WebSocket control frames, allowing oversized control frames. This improper handling causes an internal processing crash, leading to a remote denial of service (DoS) for applications using libsoup WebSockets.
AI Analysis
Technical Summary
The vulnerability exists in libsoup's WebSocket frame parser, which fails to validate that control frames (such as PING, PONG, CLOSE) adhere to the maximum payload length of 125 bytes as mandated by RFC 6455 §5.5. A remote unauthenticated attacker can send an oversized control frame that violates this rule. Instead of terminating the connection immediately, the parser mishandles the violation and crashes internally, causing a denial of service condition in applications relying on libsoup WebSockets within Red Hat Enterprise Linux 10.
Potential Impact
This vulnerability allows a remote attacker to cause a denial of service by crashing the WebSocket parser in libsoup, disrupting applications that use this library for WebSocket communication. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-15711 for current remediation guidance. No official fix or workaround is stated in the provided advisory content. Until a patch is available, consider limiting exposure of vulnerable WebSocket services to untrusted networks.
CVE-2026-15711: Allocation of Resources Without Limits or Throttling in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-15711 is a vulnerability in libsoup's WebSocket frame parsing in Red Hat Enterprise Linux 10. The library does not properly enforce the RFC 6455 §5.5 length limit for WebSocket control frames, allowing oversized control frames. This improper handling causes an internal processing crash, leading to a remote denial of service (DoS) for applications using libsoup WebSockets.
CVSS v3.1
Score 7.5high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in libsoup's WebSocket frame parser, which fails to validate that control frames (such as PING, PONG, CLOSE) adhere to the maximum payload length of 125 bytes as mandated by RFC 6455 §5.5. A remote unauthenticated attacker can send an oversized control frame that violates this rule. Instead of terminating the connection immediately, the parser mishandles the violation and crashes internally, causing a denial of service condition in applications relying on libsoup WebSockets within Red Hat Enterprise Linux 10.
Potential Impact
This vulnerability allows a remote attacker to cause a denial of service by crashing the WebSocket parser in libsoup, disrupting applications that use this library for WebSocket communication. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-15711 for current remediation guidance. No official fix or workaround is stated in the provided advisory content. Until a patch is available, consider limiting exposure of vulnerable WebSocket services to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-14T09:45:31.488Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-15711","vendor":"Red Hat"}]
Threat ID: 6a56962468715ace431dc680
Added to database: 07/14/2026, 20:03:48 UTC
Last enriched: 07/14/2026, 22:32:44 UTC
Last updated: 07/15/2026, 02:02:00 UTC
Views: 4
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