CVE-2020-27840

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

Description

A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-27840

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-27840.html

OS impact

OSVersionStatusFixed in
arch archfixed1:2.3.0-1
suse slesaffected
debian debianbullseyefixed2:2.2.0-3.1
debian debianbookwormfixed2:4.13.13+dfsg-1
debian debianforkyfixed2:4.13.13+dfsg-1
debian debiansidfixed2:4.13.13+dfsg-1
debian debiantrixiefixed2:4.13.13+dfsg-1

References

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