SB2026070174 - Red Hat Enterprise Linux 10 update for mod_http2
Published: July 1, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-48913)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use-after-free in mod_http2 when file handles are already exhausted. A remote attacker can trigger request processing under file descriptor exhaustion conditions to execute arbitrary code.
Exploitation requires the server to have exhausted file handles.
2) Out-of-bounds read (CVE-ID: CVE-2026-43951)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in merge_response_headers when processing responses with mod_headers, mod_mime, and multiple response languages. A remote attacker can trigger processing of affected responses to cause a denial of service.
The issue occurs when mod_headers and mod_mime are used with multiple response languages.
Remediation
Install update from vendor's website.