diff --git a/common.gypi b/common.gypi
index e9e05049dbb265..39afdc4d95a28d 100644
--- a/common.gypi
+++ b/common.gypi
@@ -29,7 +29,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.28',
+    'v8_embedder_string': '-node.29',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,
diff --git a/deps/v8/src/base/platform/platform-posix.cc b/deps/v8/src/base/platform/platform-posix.cc
index d21107d6f785f6..8b9e85c0e88e06 100644
--- a/deps/v8/src/base/platform/platform-posix.cc
+++ b/deps/v8/src/base/platform/platform-posix.cc
@@ -246,11 +246,11 @@ void* OS::GetRandomMmapAddr() {
   // Use extra address space to isolate the mmap regions.
   raw_addr += uint64_t{0x400000000000};
 #elif V8_TARGET_BIG_ENDIAN
-  // Big-endian Linux: 44 bits of virtual addressing.
+  // Big-endian Linux: 42 bits of virtual addressing.
   raw_addr &= uint64_t{0x03FFFFFFF000};
 #else
-  // Little-endian Linux: 48 bits of virtual addressing.
-  raw_addr &= uint64_t{0x3FFFFFFFF000};
+  // Little-endian Linux: 46 bits of virtual addressing.
+  raw_addr &= uint64_t{0x3FFFFFFF0000};
 #endif
 #elif V8_TARGET_ARCH_MIPS64
   // We allocate code in 256 MB aligned segments because of optimizations using