CVE-2021-33833

high

Published — · Modified —

CVSS v3

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CVSS v2

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VIR risk

8.0

Description

ConnMan (aka Connection Manager) 1.30 through 1.39 has a stack-based buffer overflow in uncompress in dnsproxy.c via NAME, RDATA, or RDLENGTH (for A or AAAA).

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-33833.html

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-33833

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202106-44

OS impact

OS	Version	Status	Fixed in
arch		fixed	`1.40-1`
debian	bookworm	fixed	`1.36-2.2`
debian	bullseye	fixed	`1.36-2.2`
debian	forky	fixed	`1.36-2.2`
debian	sid	fixed	`1.36-2.2`
debian	trixie	fixed	`1.36-2.2`
sles		affected

References

https://security.archlinux.org/ASA-202106-44
https://security-tracker.debian.org/tracker/CVE-2021-33833
https://www.suse.com/security/cve/CVE-2021-33833.html

Verify integrity in audit chain (admin only). AS-IS.