fkie_cve-2025-39903
Vulnerability from fkie_nvd
Published
2025-10-01 08:15
Modified
2025-10-02 19:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: of_numa: fix uninitialized memory nodes causing kernel panic When there are memory-only nodes (nodes without CPUs), these nodes are not properly initialized, causing kernel panic during boot. of_numa_init of_numa_parse_cpu_nodes node_set(nid, numa_nodes_parsed); of_numa_parse_memory_nodes In of_numa_parse_cpu_nodes, numa_nodes_parsed gets updated only for nodes containing CPUs. Memory-only nodes should have been updated in of_numa_parse_memory_nodes, but they weren't. Subsequently, when free_area_init() attempts to access NODE_DATA() for these uninitialized memory nodes, the kernel panics due to NULL pointer dereference. This can be reproduced on ARM64 QEMU with 1 CPU and 2 memory nodes: qemu-system-aarch64 \ -cpu host -nographic \ -m 4G -smp 1 \ -machine virt,accel=kvm,gic-version=3,iommu=smmuv3 \ -object memory-backend-ram,size=2G,id=mem0 \ -object memory-backend-ram,size=2G,id=mem1 \ -numa node,nodeid=0,memdev=mem0 \ -numa node,nodeid=1,memdev=mem1 \ -kernel $IMAGE \ -hda $DISK \ -append "console=ttyAMA0 root=/dev/vda rw earlycon" [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x481fd010] [ 0.000000] Linux version 6.17.0-rc1-00001-gabb4b3daf18c-dirty (yintirui@local) (gcc (GCC) 12.3.1, GNU ld (GNU Binutils) 2.41) #52 SMP PREEMPT Mon Aug 18 09:49:40 CST 2025 [ 0.000000] KASLR enabled [ 0.000000] random: crng init done [ 0.000000] Machine model: linux,dummy-virt [ 0.000000] efi: UEFI not found. [ 0.000000] earlycon: pl11 at MMIO 0x0000000009000000 (options '') [ 0.000000] printk: legacy bootconsole [pl11] enabled [ 0.000000] OF: reserved mem: Reserved memory: No reserved-memory node in the DT [ 0.000000] NODE_DATA(0) allocated [mem 0xbfffd9c0-0xbfffffff] [ 0.000000] node 1 must be removed before remove section 23 [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000040000000-0x00000000ffffffff] [ 0.000000] DMA32 empty [ 0.000000] Normal [mem 0x0000000100000000-0x000000013fffffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000] node 1: [mem 0x00000000c0000000-0x000000013fffffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0 [ 0.000000] Mem abort info: [ 0.000000] ESR = 0x0000000096000004 [ 0.000000] EC = 0x25: DABT (current EL), IL = 32 bits [ 0.000000] SET = 0, FnV = 0 [ 0.000000] EA = 0, S1PTW = 0 [ 0.000000] FSC = 0x04: level 0 translation fault [ 0.000000] Data abort info: [ 0.000000] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 0.000000] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 0.000000] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 0.000000] [00000000000000a0] user address but active_mm is swapper [ 0.000000] Internal error: Oops: 0000000096000004 [#1] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.17.0-rc1-00001-g760c6dabf762-dirty #54 PREEMPT [ 0.000000] Hardware name: linux,dummy-virt (DT) [ 0.000000] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 0.000000] pc : free_area_init+0x50c/0xf9c [ 0.000000] lr : free_area_init+0x5c0/0xf9c [ 0.000000] sp : ffffa02ca0f33c00 [ 0.000000] x29: ffffa02ca0f33cb0 x28: 0000000000000000 x27: 0000000000000000 [ 0.000000] x26: 4ec4ec4ec4ec4ec5 x25: 00000000000c0000 x24: 00000000000c0000 [ 0.000000] x23: 0000000000040000 x22: 0000000000000000 x21: ffffa02ca0f3b368 [ 0.000000] x20: ffffa02ca14c7b98 x19: 0000000000000000 x18: 0000000000000002 [ 0.000000] x17: 000000000000cacc x16: 0000000000000001 x15: 0000000000000001 [ 0.000000] x14: 0000000080000000 x13: 0000000000000018 x12: 0000000000000002 [ 0.0 ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2daa6eb4740720b5bd0e06267d7c93a3eed844e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee4d098cbc9160f573b5c1b5a51d6158efdb2896
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f3286ad8eeae15fd4bd5c12f9adfe888b26baf62
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nof_numa: fix uninitialized memory nodes causing kernel panic\n\nWhen there are memory-only nodes (nodes without CPUs), these nodes are not\nproperly initialized, causing kernel panic during boot.\n\nof_numa_init\n\tof_numa_parse_cpu_nodes\n\t\tnode_set(nid, numa_nodes_parsed);\n\tof_numa_parse_memory_nodes\n\nIn of_numa_parse_cpu_nodes, numa_nodes_parsed gets updated only for nodes\ncontaining CPUs.  Memory-only nodes should have been updated in\nof_numa_parse_memory_nodes, but they weren\u0027t.\n\nSubsequently, when free_area_init() attempts to access NODE_DATA() for\nthese uninitialized memory nodes, the kernel panics due to NULL pointer\ndereference.\n\nThis can be reproduced on ARM64 QEMU with 1 CPU and 2 memory nodes:\n\nqemu-system-aarch64 \\\n-cpu host -nographic \\\n-m 4G -smp 1 \\\n-machine virt,accel=kvm,gic-version=3,iommu=smmuv3 \\\n-object memory-backend-ram,size=2G,id=mem0 \\\n-object memory-backend-ram,size=2G,id=mem1 \\\n-numa node,nodeid=0,memdev=mem0 \\\n-numa node,nodeid=1,memdev=mem1 \\\n-kernel $IMAGE \\\n-hda $DISK \\\n-append \"console=ttyAMA0 root=/dev/vda rw earlycon\"\n\n[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x481fd010]\n[    0.000000] Linux version 6.17.0-rc1-00001-gabb4b3daf18c-dirty (yintirui@local) (gcc (GCC) 12.3.1, GNU ld (GNU Binutils) 2.41) #52 SMP PREEMPT Mon Aug 18 09:49:40 CST 2025\n[    0.000000] KASLR enabled\n[    0.000000] random: crng init done\n[    0.000000] Machine model: linux,dummy-virt\n[    0.000000] efi: UEFI not found.\n[    0.000000] earlycon: pl11 at MMIO 0x0000000009000000 (options \u0027\u0027)\n[    0.000000] printk: legacy bootconsole [pl11] enabled\n[    0.000000] OF: reserved mem: Reserved memory: No reserved-memory node in the DT\n[    0.000000] NODE_DATA(0) allocated [mem 0xbfffd9c0-0xbfffffff]\n[    0.000000] node 1 must be removed before remove section 23\n[    0.000000] Zone ranges:\n[    0.000000]   DMA      [mem 0x0000000040000000-0x00000000ffffffff]\n[    0.000000]   DMA32    empty\n[    0.000000]   Normal   [mem 0x0000000100000000-0x000000013fffffff]\n[    0.000000] Movable zone start for each node\n[    0.000000] Early memory node ranges\n[    0.000000]   node   0: [mem 0x0000000040000000-0x00000000bfffffff]\n[    0.000000]   node   1: [mem 0x00000000c0000000-0x000000013fffffff]\n[    0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x00000000bfffffff]\n[    0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0\n[    0.000000] Mem abort info:\n[    0.000000]   ESR = 0x0000000096000004\n[    0.000000]   EC = 0x25: DABT (current EL), IL = 32 bits\n[    0.000000]   SET = 0, FnV = 0\n[    0.000000]   EA = 0, S1PTW = 0\n[    0.000000]   FSC = 0x04: level 0 translation fault\n[    0.000000] Data abort info:\n[    0.000000]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\n[    0.000000]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n[    0.000000]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[    0.000000] [00000000000000a0] user address but active_mm is swapper\n[    0.000000] Internal error: Oops: 0000000096000004 [#1]  SMP\n[    0.000000] Modules linked in:\n[    0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.17.0-rc1-00001-g760c6dabf762-dirty #54 PREEMPT\n[    0.000000] Hardware name: linux,dummy-virt (DT)\n[    0.000000] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[    0.000000] pc : free_area_init+0x50c/0xf9c\n[    0.000000] lr : free_area_init+0x5c0/0xf9c\n[    0.000000] sp : ffffa02ca0f33c00\n[    0.000000] x29: ffffa02ca0f33cb0 x28: 0000000000000000 x27: 0000000000000000\n[    0.000000] x26: 4ec4ec4ec4ec4ec5 x25: 00000000000c0000 x24: 00000000000c0000\n[    0.000000] x23: 0000000000040000 x22: 0000000000000000 x21: ffffa02ca0f3b368\n[    0.000000] x20: ffffa02ca14c7b98 x19: 0000000000000000 x18: 0000000000000002\n[    0.000000] x17: 000000000000cacc x16: 0000000000000001 x15: 0000000000000001\n[    0.000000] x14: 0000000080000000 x13: 0000000000000018 x12: 0000000000000002\n[    0.0\n---truncated---"
    }
  ],
  "id": "CVE-2025-39903",
  "lastModified": "2025-10-02T19:12:17.160",
  "metrics": {},
  "published": "2025-10-01T08:15:33.133",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2daa6eb4740720b5bd0e06267d7c93a3eed844e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee4d098cbc9160f573b5c1b5a51d6158efdb2896"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f3286ad8eeae15fd4bd5c12f9adfe888b26baf62"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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