Red Hat Security Advisory: mod_http2 security, bug fix, and enhancement update
Two security vulnerabilities were identified in the Apache HTTP Server mod_http2 module used in Red Hat Enterprise Linux 10. These include a Use After Free vulnerability (CVE-2026-48913) that could allow arbitrary code execution or denial of service, and an Out-of-bounds Read vulnerability (CVE-2026-43951) in mod_headers and mod_mime. Red Hat has released an update addressing these issues in mod_http2. The update is rated as having a moderate security impact. Users of affected Red Hat Enterprise Linux 10 variants should apply the provided update to mitigate these vulnerabilities.
AI Analysis
Technical Summary
The mod_http2 module in Apache HTTP Server, which implements HTTP/2 protocol support on top of libnghttp2 for httpd 2.4 servers, contains two vulnerabilities. CVE-2026-48913 is a Use After Free vulnerability in mod_http2 that can lead to arbitrary code execution or denial of service. CVE-2026-43951 is an Out-of-bounds Read vulnerability in mod_headers and mod_mime modules. Red Hat has issued a security advisory (RHSA-2026:34355) with updated mod_http2 packages for Red Hat Enterprise Linux 10 to address these vulnerabilities. The advisory includes bug fixes and enhancements related to these CVEs. The vulnerabilities are rated with moderate severity by Red Hat Product Security.
Potential Impact
Successful exploitation of CVE-2026-48913 could allow an attacker to execute arbitrary code or cause a denial of service on affected systems running mod_http2. CVE-2026-43951 could lead to information disclosure or application instability due to out-of-bounds memory reads. The overall security impact is rated as moderate by Red Hat. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated mod_http2 packages for Red Hat Enterprise Linux 10 that fix these vulnerabilities. Users should apply the official Red Hat update as described in the advisory RHSA-2026:34355 and the referenced article https://access.redhat.com/articles/11258. Since this is an official fix, applying the update fully mitigates the vulnerabilities. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: mod_http2 security, bug fix, and enhancement update
Description
Two security vulnerabilities were identified in the Apache HTTP Server mod_http2 module used in Red Hat Enterprise Linux 10. These include a Use After Free vulnerability (CVE-2026-48913) that could allow arbitrary code execution or denial of service, and an Out-of-bounds Read vulnerability (CVE-2026-43951) in mod_headers and mod_mime. Red Hat has released an update addressing these issues in mod_http2. The update is rated as having a moderate security impact. Users of affected Red Hat Enterprise Linux 10 variants should apply the provided update to mitigate these vulnerabilities.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The mod_http2 module in Apache HTTP Server, which implements HTTP/2 protocol support on top of libnghttp2 for httpd 2.4 servers, contains two vulnerabilities. CVE-2026-48913 is a Use After Free vulnerability in mod_http2 that can lead to arbitrary code execution or denial of service. CVE-2026-43951 is an Out-of-bounds Read vulnerability in mod_headers and mod_mime modules. Red Hat has issued a security advisory (RHSA-2026:34355) with updated mod_http2 packages for Red Hat Enterprise Linux 10 to address these vulnerabilities. The advisory includes bug fixes and enhancements related to these CVEs. The vulnerabilities are rated with moderate severity by Red Hat Product Security.
Potential Impact
Successful exploitation of CVE-2026-48913 could allow an attacker to execute arbitrary code or cause a denial of service on affected systems running mod_http2. CVE-2026-43951 could lead to information disclosure or application instability due to out-of-bounds memory reads. The overall security impact is rated as moderate by Red Hat. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated mod_http2 packages for Red Hat Enterprise Linux 10 that fix these vulnerabilities. Users should apply the official Red Hat update as described in the advisory RHSA-2026:34355 and the referenced article https://access.redhat.com/articles/11258. Since this is an official fix, applying the update fully mitigates the vulnerabilities. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:34355
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-48913"]
- Cvss Version
- null
Threat ID: 6a46ed0327e9c79719445203
Added to database: 07/02/2026, 22:58:11 UTC
Last enriched: 07/02/2026, 23:32:08 UTC
Last updated: 07/03/2026, 03:24:49 UTC
Views: 7
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