| Name | CVE-2026-33811 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| golang-1.15 (PTS) | bullseye | 1.15.15-1~deb11u4 | vulnerable |
| golang-1.19 (PTS) | bookworm | 1.19.8-2 | vulnerable |
| golang-1.24 (PTS) | trixie | 1.24.4-1 | vulnerable |
| golang-1.25 (PTS) | forky | 1.25.9-1 | vulnerable |
| sid | 1.25.10-1 | fixed | |
| golang-1.26 (PTS) | forky | 1.26.2-3 | vulnerable |
| sid | 1.26.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| golang-1.15 | source | (unstable) | (unfixed) | |||
| golang-1.19 | source | (unstable) | (unfixed) | |||
| golang-1.24 | source | (unstable) | (unfixed) | |||
| golang-1.25 | source | (unstable) | 1.25.10-1 | |||
| golang-1.26 | source | (unstable) | 1.26.3-1 |
https://go-review.googlesource.com/c/go/+/767860
https://github.com/golang/go/issues/78803
https://groups.google.com/g/golang-announce/c/qcCIEXso47M