CVE Database›Document archive›CVE-2019-12904

CVE-2019-12904

Libgcrypt: physical addresses being available to other processes leads to a flush-and-reload side-channel attack

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Severity

Moderate

Red Hat Product Security

5.9

CVSS 3.0

Review impact separately from score.

Published · July 16, 2019

Updated · January 21, 2026

Description

[Disputed] A vulnerability has been identified in Libgcrypt due to a flaw in its C implementation of AES. This vulnerability enables a remote attacker to perform a flush-and-reload side-channel attack, potentially accessing sensitive information. The vulnerability arises from the availability of physical addresses to other processes, particularly on platforms lacking an assembly-language implementation.

Statement

Please note that this issue is more theoretical than practical in terms of potential attack scenarios. The upstream developers have disputed this CVE, and the patches they supplied seem to focus more on hardening. Refer to external references for further details.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 5.9
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-385 · Covert Timing Channel