CVE-2017-7393

high

Published 2017-04-01 · Modified 2026-05-13

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

8.8

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

8.8

Description

In TigerVNC 1.7.1 (VNCSConnectionST.cxx VNCSConnectionST::fence), an authenticated client can cause a double free, leading to denial of service or potentially code execution.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	bookworm	fixed	`1.7.0+dfsg-7`
debian	bullseye	fixed	`1.7.0+dfsg-7`
debian	forky	fixed	`1.7.0+dfsg-7`
debian	sid	fixed	`1.7.0+dfsg-7`
debian	trixie	fixed	`1.7.0+dfsg-7`

Application impact

Vendor	Product	Versions	Fixed
tigervnc	tigervnc	`1.7.1`

References

CWEs

CWE-415

Community-verified mitigations for this CVE will appear above when contributors publish them.

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