Meltdown and Spectre exploit critical vulnerabilities in modern processors. These hardware vulnerabilities allow programs to steal data which is currently processed on the computer. While programs are typically not permitted to read data from other programs, a malicious program can exploit Meltdown and Spectre to get hold of secrets stored in the memory of other running programs. This might include your passwords stored in a password manager or browser, your personal photos, emails, instant messages and even business-critical documents.

Here come's the recent firmware updates on each specific Samsung Galaxy S7 and S7 edge devices, including carrier providers that deployed the said "Meltdown" and "Spectre" migration patches.
United States (Factory Unlocked)
- Device name/number: Samsung Galaxy S7 SM-G930U
- Android version: 7.0 (Nougat)
- Baseband version: G930UUES4BRC1
- Kernel version: 3.18.31-12483084
- Build number: NRD90M.G930UUES4BRC1
- Android security patch level: January 1, 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935U
- Android version: 7.0 (Nougat)
- Baseband version: G935UUES4BRC1
- Kernel version: 3.18.31-12483084
- Build number: NRD90M.G935UUES4BRC1
- Android security patch level: January 1, 2018
AT&T (United States)
- Device name/number: Samsung Galaxy S7 SM-G930A
- Android version: 7.0 Nougat
- Baseband version: G930AUCS4BRA1
- Kernel version: 3.18.31-12564870
- Build number: NRD90M.G930AUCS4BRA1
- Android security patch level: January 1, 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935A
- Android version: 7.0 Nougat
- Baseband version: G935AUCS4BRA1
- Kernel version: 3.18.31-12564870
- Build number: NRD90M.G935AUCS4BRA1
- Android security patch level: January 1, 2018
Sprint (United States)
- Device name/number: Samsung Galaxy S7 SM-G930P
- Android version: 7.0 Nougat
- Baseband version: G930PVPS5BRA1
- Kernel version: 3.18.31-12410240
- Build number: NRD90M.G930PVPS5BRA1
- Android security patch level: January 1, 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935P
- Android version: 7.0 Nougat
- Baseband version: G935PVPS5BRA1
- Kernel version: 3.18.31-12410240
- Build number: NRD90M.G935PVPS5BRA1
- Android security patch level: January 1, 2018
T-Mobile (United States)
- Device name/number: Samsung Galaxy S7 SM-G930T
- Android version: 7.0 (Nougat)
- Baseband version: G930TUVS4BRA1
- Kernel version: 3.18.31-12142063
- Build number: NRD90M.G930TUVS4BRA1
- Android security patch level: January 1, 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935T
- Android version: 7.0 (Nougat)
- Baseband version: G935TUVS4BRA1
- Kernel version: 3.18.31-12142063
- Build number: NRD90M.G935TUVS4BRA1
- Android security patch level: January 1, 2018
Verizon (United States)
- Device name/number: Samsung Galaxy S7 SM-G930V
- Android version: 7.0 (Nougat)
- Baseband version: G930VVRS4BRA1
- Kernel version: 3.18.31
- Build number: NRD90M.G930VVRS4BRA1
- Android security patch level: January 1, 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935V
- Android version: 7.0 (Nougat)
- Baseband version: G930VVRS4BRA1
- Kernel version: 3.18.31
- Build number: NRD90M.G930VVRS4BRA1
- Android security patch level: January 1, 2018
Canada (Bell, Rogers, Telus, other carriers)
- Device name/number: Samsung Galaxy S7 SM-G930W8
- Android version: 7.0 (Nougat)
- Baseband version: G930W8VLS3BRA2
- Kernel version: 3.18.31-12546086
- Build number: NRD90M.G930W8VLS3BRA2
- Android security patch level: January 1, 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935W8
- Android version: 7.0 (Nougat)
- Baseband version: G935W8VLS3BRA2
- Kernel version: 3.18.31-12546086
- Build number: NRD90M.G935W8VLS3BRA2
- Android security patch level: January 1, 2018
Europe (factory unlocked)
- Device name/number: Samsung Galaxy S7 SM-G930F
- Android version: 7.0 (Nougat)
- Baseband version: G930FXXS2DRAA
- Kernel version: 3.18.31-12365438
- Build number: NRD90M.G930FXXS2DRAA
- Android security patch level: 1 January 2018
- Device name/number: Samsung Galaxy S7 edge SM-G935F
- Android version: 7.0 (Nougat)
- Baseband version: G935FXXS2DRAA
- Kernel version: 3.18.31-12365438
- Build number: NRD90M.G935FXXS2DRAA
- Android security patch level: 1 January 2018
Australia, and New Zealand (factory unlocked & Vodafone, Telstra, Optus)
- Device name/number: Samsung Galaxy S7 SM-G930F
- Android version: 7.0 (Nougat)
- Android security patch level: 2018-01-01
- Baseband version: G930FXXU2DRAC
- Kernel version: 3.18.31-12365438
- Build number: NRD90M.G930FXXU2DRAC
- Android security patch level: 1 January 2018
- Device name/number: Samsung Galaxy S7 SM-G935F
- Android version: 7.0 (Nougat)
- Android security patch level: 2018-01-01
- Baseband version: G935FXXU2DRAC
- Kernel version: 3.18.31-12365438
- Build number: NRD90M.G935FXXU2DRAC
- Android security patch level: 1 January 2018
Some other countries and network providers may also receives similar updates but it only differs in build numbers. If you haven't seen it coming yet, it is much better check your your device Settings > About device > Check for an Updates.
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