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Security Advisory: LiteSpeed Web Server Heap Overflow

This is a security release for LiteSpeed. Update the product on every affected server to the patched release — there is no workaround, and unpatched servers remain exposed until updated.

Critical
LiteSpeed AlmaLinux 9 CentOS 7

Affected Versions

6.0.4 and earlier

Patched Version

6.0.5

Default Update CMD

yum update -y

Fix Commands

CentOS 7

yum clean all
/usr/local/lsws/bin/lshttpd -v

AlmaLinux 9

dnf clean metadata
/usr/local/lsws/bin/lshttpd -v

What this means under a SharedLicense license

Your SharedLicense license itself is not affected — this is a change in LiteSpeed software, not in licensing. Update the product through its standard update channel. Licenses keep working through updates; nothing needs re-issuing or re-activating.

A heap buffer overflow was identified in LiteSpeed Web Server HTTP/2 handling. A crafted request could cause a crash or remote code execution.

Check your system for vulnerabilities

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