UBUNTU-CVE-2026-33811

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-33811
Published: 07 May 2026, 20:16
Last modified:20 May 2026, 16:25

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

07 May 2026, 20:16
Published
Vulnerability first disclosed
20 May 2026, 16:25
Last Modified
Vulnerability information updated

Description

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • ubuntu•golang-1.10

    all | all | all

  • ubuntu•golang-1.13

    all | all

  • ubuntu•golang-1.14

    all

  • ubuntu•golang-1.16

    all

  • ubuntu•golang-1.17

    all

  • ubuntu•golang-1.18

    all | all | all

  • ubuntu•golang-1.20

    all | all

  • ubuntu•golang-1.21

    all | all | all

  • ubuntu•golang-1.22

    all | all | all

  • ubuntu•golang-1.23

    all | all | all | all

  • ubuntu•golang-1.24

    all | all | all | all

  • ubuntu•golang-1.25

    all | all

  • ubuntu•golang-1.6

    all

  • ubuntu•golang-1.8

    all

  • ubuntu•golang-1.9

    all

References (8)