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Advisory severityMedium5.9Red Hat Linux

Medium [CVE-2026-97032] Denial of Service via concurrent HPACK encoder modification

This medium-severity Red Hat Linux advisory covers CVE-2026-97032; related products: Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-97032 Source published Source updated

VulniPulse record published Record updated

CVE-2026-97032
Related products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

Denial of Service via concurrent HPACK encoder modification. Red Hat rates this moderate (CVSS 5.9).

Weakness: CWE-366. Red Hat lists fixing advisory RHSA-2026:90994 with package go-toolset:rhel8-8080020261020152326.6b4b45d8, golang-0:1.26.10-1.el9_8, golang-0:1.26.10-1.el9_6, golang-0:1.26.10-1.el9_4.

Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 10.

Is CVE-2026-97032 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-97032 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-97032?

Upgrade to a fixed release named by Red Hat:

  • go-toolset:rhel8-8080020261020152326.6b4b45d8
  • golang-0:1.26.10-1.el9_8
  • golang-0:1.26.10-1.el9_6
  • golang-0:1.26.10-1.el9_4
  • golang-0:1.26.10-1.el9_2
  • go-toolset:rhel8-8100020261020054335.a3795dee
  • go-toolset:rhel8-8040020261027035356.522a0ee4
  • go-toolset:rhel8-8060020261020153812.97d7f71f
  • golang-0:1.26.10-1.el10_2
  • golang-0:1.26.10-1.el10_0
  • RHSA-2026:90994

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Fixed versions
  • go-toolset:rhel8-8080020261020152326.6b4b45d8
  • golang-0:1.26.10-1.el9_8
  • golang-0:1.26.10-1.el9_6
  • golang-0:1.26.10-1.el9_4
  • golang-0:1.26.10-1.el9_2
  • go-toolset:rhel8-8100020261020054335.a3795dee
  • go-toolset:rhel8-8040020261027035356.522a0ee4
  • go-toolset:rhel8-8060020261020153812.97d7f71f
  • golang-0:1.26.10-1.el10_2
  • golang-0:1.26.10-1.el10_0
  • RHSA-2026:90994

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Disable HTTP/2 server processing in affected Go applications by setting the environment variable GODEBUG=http2server=0, or restrict network exposure to trusted clients. For applications managed by systemd, configure the environment variable by creating a service override: systemctl edit <service-name> Add the following lines under the [Service] section: [Service] Environment="GODEBUG=http2server=0" Apply the changes and restart the daemon: systemctl daemon-reload systemctl restart <service-name> To limit network exposure using firewalld, restrict access to trusted networks: firewall-cmd --zone=trusted --add-source=<trusted-ip-range> --permanent firewall-cmd --reload Caveats: Disabling HTTP/2 forces incoming client traffic to HTTP/1.1 and will break protocols that require HTTP/2, such as gRPC. Warning: Reloading systemd configurations and restarting the service or firewall will briefly interrupt active network sessions and cause temporary service unavailability.

Official advisory · high-confidence parse· fetched 24 days ago·verify at source

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