Red Hat Security Advisory: mod_http2 security update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 7.5 High : upgrade the Red Hat redhat/mod_http2 package to 9.4.2 soon.
Data as of 26 Oct 2026, 08:30 UTC
- EPSS
- 1.3% chance of exploitation in 30 days – higher than 71% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 9.4.2
Exploitation evidence
Disclosed: evidence found.
CVE published 10 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade the Red Hat redhat/mod_http2 package to 9.4.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Red Hatredhat/mod_http2pkg:rpm/redhat/mod_http2Other threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Red Hat has released an official security update for the mod_http2 package that addresses this vulnerability. Users of Red Hat Enterprise Linux 9.4 should apply the update to versions 9.4.2 or later as provided by Red Hat. Refer to the Red Hat advisory RHSA-2025:15727 and the update instructions at https://access.redhat.com/articles/11258 for detailed remediation steps.
Description
A moderate severity vulnerability (CVE-2025-49630) exists in the Apache mod_proxy_http2 module used by Red Hat Enterprise Linux 9.4. The vulnerability is caused by untrusted client input leading to an assertion failure in the HTTP/2 protocol implementation. Red Hat has released an update to address this issue in the mod_http2 package for multiple architectures and variants of RHEL 9.4.
References
- access.redhat.com/errata/RHSA-2025:15727 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2374578 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_15727.json (opens in a new tab)
- suse.com/support/security/rating/ (opens in a new tab)
- ftp.suse.com/pub/projects/security/csaf/rhsa-2025_14983.json (opens in a new tab)
- lists.suse.com/pipermail/suse-liberty-linux-updates/2025-September/001964.html (opens in a new tab)
- suse.com/security/cve/CVE-2025-49630/ (opens in a new tab)