CVE-2026-42530
CVE-2026-42530: 2 tracked advisory records across F5, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
F5
1 advisory- Advisory severityCritical9.2
Critical [CVE-2026-42530] NGINX Open Source has a vulnerability in the ngx_http_v3_module module
CVE-2026-42530Source published Source updated
NGINX Open Source has a vulnerability in the ngx_http_v3_module module. When NGINX Open Source is configured to use the HTTP/3 QUIC module, a remote unauthenticated attacker along with conditions beyond their control can use a specially crafted HTTP/3 session to reopen a QPACK encoder stream. This may cause a Use-after-Free in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- Affected products in this advisory
- NGINX Open Source
- Source-reported affected versions
- NGINX Open Source 1.31.0 before 1.31.2
- Source-reported fixed versions
- 1.31.2
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
Red Hat
1 advisory- Advisory severityHigh8.1
High [CVE-2026-42530] use-after-free issue leads to denial of service
CVE-2026-42530Source published Source updated
NGINX Open Source has a vulnerability in the ngx_http_v3_module module. This may cause a Use-after-Free in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. This vulnerability is only exploitable when NGINX is configured to use the HTTP/3 QUIC module. This issue allows a remote unauthenticated attacker to potentially execute arbitrary code or cause a denial of service by forcing the worker process to restart. Default Red Hat Enterprise Linux security features, including SELinux enforcement, Address Space Layout Randomization (ASLR) and NX (No-Execute)…
- Affected products in this advisory
- Red Hat Hardened Images
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- nginx-main-1.30.2-1.hum1
- RHSA-2026:20351
- Mitigation guidance
- To mitigate this vulnerability, disable HTTP/3 by removing quic from all listen directives.
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