CVE-2019-12904
Libgcrypt: physical addresses being available to other processes leads to a flush-and-reload side-channel attack
Severity
ModerateRed Hat Product Security
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 · 5.9CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-385 · Covert Timing Channel