Bug 2555615 (CVE-2026-112273) - CVE-2026-112273 libtins: Heap Out-of-Bounds Read via DNS::compose_name
Summary: CVE-2026-112273 libtins: Heap Out-of-Bounds Read via DNS::compose_name
Keywords:
Status: NEW
Alias: CVE-2026-112273
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: 2556168 2556169
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-19 14:23 UTC by OSIDB Bzimport
Modified: 2026-10-20 13:09 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-19 14:23:30 UTC 
libtins through 4.6 contains a heap out-of-bounds read vulnerability in DNS::compose_name in src/dns.cpp that allows remote attackers to read past the packet buffer by sending a label ending exactly at the packet end. Attackers can deliver crafted DNS packets whose additional, answer, or authority records trigger a one-byte read when parsed, crashing applications on hardened allocators.
Note You need to log in before you can comment on or make changes to this bug.