CVE-2026-112273CWE-125

CVE-2026-112273

Medium · published October 19, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
39.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00472 · 39.9th percentile
Weakness
CWE-125 · Out-of-bounds Read
Published
2026-10-19T18:17Z
References (5)
https://github.com/mfontanini/libtins · [email protected]https://github.com/mfontanini/libtins/blob/v4.6/src/dns.cpp#L338-L389 · [email protected]https://hackmd.io/@haindpwn/libtins-dns-name-parsing-oob-read · [email protected]https://www.vulncheck.com/advisories/libtins-through-4.6-heap-out-of-bounds-read-via-dns-compose-name · [email protected]https://hackmd.io/@haindpwn/cve-2026-112273-112274-libtins-dns-name-parsing-oob-read · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 19 OCT 13:55Z
    libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name
    cvelistv5
  • 19 OCT 13:55Z
    libtins through 4.6 Heap Out-of-Bounds Read via DNS::compose_name
    cvelistv5