CVE-2014-7155

medium

Published 2014-10-02 · Modified 2026-05-06

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

5.8

Description

The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.

Predictions

Exploit likelihood

20%

Patch ETA

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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

Fedora Affected 2 releases

Version	Status	Fixed in
20	Affected	—
19	Affected	—

SUSE Affected 2 releases

Version	Status	Fixed in
13.1	Affected	—
12.3	Affected	—

Debian Mixed 6 releases

Version	Status	Fixed in
trixie	Fixed	`4.4.1-3`
sid	Fixed	`4.4.1-3`
forky	Fixed	`4.4.1-3`
bullseye	Fixed	`4.4.1-3`
bookworm	Fixed	`4.4.1-3`
7.0	Affected	—

References

CWEs

CWE-264

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

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