Bug 2453345 (CVE-2026-27854) - CVE-2026-27854 DNSdist: DNSdist: Denial of Service due to use-after-free vulnerability in Lua
Summary: CVE-2026-27854 DNSdist: DNSdist: Denial of Service due to use-after-free vuln...
Keywords:
Status: NEW
Alias: CVE-2026-27854
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2453418 2453419
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-31 13:02 UTC by OSIDB Bzimport
Modified: 2026-03-31 16:21 UTC (History)
0 users

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Description OSIDB Bzimport 2026-03-31 13:02:06 UTC 
An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.
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