CVE-2021-42114 describes a Rowhammer vulnerability affecting modern PC-DDR4 and LPDDR4X DRAM devices from Samsung, SK Hynix, and Micron, even those with advertised TRR mitigations. Attackers can trigger bit flips using novel, non-uniform Rowhammer access patterns, enabling privilege escalation or compromising cryptographic keys. Rated 8.3 HIGH (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H), this vulnerability has a high impact on confidentiality, integrity, and availability, but requires high attack complexity and adjacent network access. There is currently no public exploit code, and it is not listed on the CISA KEV catalog, with minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:samsung:ddr4_sdram_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:samsung:lddr4_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:micron:lddr4_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:micron:ddr4_sdram_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:skhynix:ddr4_sdram_firmware:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.