CVE-2020-10255
Modern DRAM chips (DDR4 and LPDDR4 after 2015) are affected by a vulnerability in deployment of internal mitigations against RowHammer attacks known as Target Row Refresh (TRR), aka the TRRespass issue.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Modern DRAM chips (DDR4 and LPDDR4 after 2015) are affected by a vulnerability in deployment of internal mitigations against RowHammer attacks known as Target Row Refresh (TRR), aka the TRRespass issue. To exploit this vulnerability, the attacker needs to create certain access patterns to trigger bit flips on affected memory modules, aka a Many-sided RowHammer attack. This means that, even when chips advertised as RowHammer-free are used, attackers may still be able to conduct privilege-escalation attacks against the kernel, conduct privilege-escalation attacks against the Sudo binary, and achieve cross-tenant virtual-machine access by corrupting RSA keys. The issue affects chips produced by SK Hynix, Micron, and Samsung. NOTE: tracking DRAM supply-chain issues is not straightforward because a single product model from a single vendor may use DRAM chips from different manufacturers.
- CVSS 3.1
- 9.0 CRITICALCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 2.74% probability · 86th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- micron/ddr4 sdram · micron/lpddr4 · samsung/ddr4 · samsung/lpddr4 · skhynix/ddr4 sdram · skhynix/lpddr4
- Source
- cve@mitre.org
EPSS 2.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://download.vusec.net/papers/trrespass_sp20.pdfThird Party Advisory
- https://github.com/vusec/trrespassProduct
- https://thehackernews.com/2020/03/rowhammer-vulnerability-ddr4-dram.htmlThird Party Advisory
- https://twitter.com/antumbral/status/1237425959407513600Third Party Advisory
- https://twitter.com/vu5ec/status/1237399112590467072Third Party Advisory
- https://www.vusec.net/projects/trrespass/Third Party Advisory
- https://download.vusec.net/papers/trrespass_sp20.pdfThird Party Advisory
- https://github.com/vusec/trrespassProduct
- https://thehackernews.com/2020/03/rowhammer-vulnerability-ddr4-dram.htmlThird Party Advisory
- https://twitter.com/antumbral/status/1237425959407513600Third Party Advisory
- https://twitter.com/vu5ec/status/1237399112590467072Third Party Advisory
- https://www.vusec.net/projects/trrespass/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.