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 the libsoup library used by Red Hat Enterprise Linux 10. It involves improper validation of WebSocket control frame lengths, violating RFC 6455 §5.5 requirements that control frames must have payloads of 125 bytes or less. A remote attacker can send an oversized control frame, causing the parser to crash and resulting in a denial of service (DoS) for applications using libsoup WebSockets.
AI Analysis
Technical Summary
The vulnerability exists in libsoup's WebSocket frame parsing implementation where it fails to enforce the maximum payload length of 125 bytes for control frames as mandated by RFC 6455 §5.5. When a remote, unauthenticated attacker sends a non-compliant oversized control frame, the parser does not terminate the connection immediately as required but instead crashes during internal processing. This leads to a remote denial of service condition affecting applications that utilize libsoup WebSockets on Red Hat Enterprise Linux 10.
Potential Impact
This vulnerability allows a remote unauthenticated attacker to cause a denial of service by crashing the WebSocket parser in libsoup. There is no impact on confidentiality or integrity, but availability is affected due to application crashes triggered by malformed WebSocket control frames.
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 temporary workaround is stated in the provided information. Until a patch is available, consider limiting exposure of vulnerable WebSocket services to untrusted networks if possible.
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 the libsoup library used by Red Hat Enterprise Linux 10. It involves improper validation of WebSocket control frame lengths, violating RFC 6455 §5.5 requirements that control frames must have payloads of 125 bytes or less. A remote attacker can send an oversized control frame, causing the parser to crash and resulting in a 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 parsing implementation where it fails to enforce the maximum payload length of 125 bytes for control frames as mandated by RFC 6455 §5.5. When a remote, unauthenticated attacker sends a non-compliant oversized control frame, the parser does not terminate the connection immediately as required but instead crashes during internal processing. This leads to a remote denial of service condition affecting applications that utilize libsoup WebSockets on Red Hat Enterprise Linux 10.
Potential Impact
This vulnerability allows a remote unauthenticated attacker to cause a denial of service by crashing the WebSocket parser in libsoup. There is no impact on confidentiality or integrity, but availability is affected due to application crashes triggered by malformed WebSocket control frames.
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 temporary workaround is stated in the provided information. Until a patch is available, consider limiting exposure of vulnerable WebSocket services to untrusted networks if possible.
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: 07/21/2026, 22:34:18 UTC
Last updated: 08/25/2026, 10:52:07 UTC
Views: 75
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