{
  "cveId": "CVE-2023-53135",
  "url": "https://patchblox.com/security/cve/CVE-2023-53135",
  "summary": "CVE-2023-53135 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53135, released May 2, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: Use READ_ONCE_NOCHECK in imprecise unwind...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  riscv: Use READ_ONCE_NOCHECK in imprecise unwinding stack mode  When CONFIG_FRAME_POINTER is unset, the stack unwinding function walk_stackframe randomly reads the stack and then, when KASAN is enabled, it can lead to the following backtrace:  [    0.000000] ================================================================== [    0.000000] BUG: KASAN: stack-out-of-bounds in walk_stackframe\u002B0xa6/0x11a [    0.000000] Read of size 8 at addr ffffffff81807c40 by task swapper/0 [    0.000000] [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.2.0-12919-g24203e6db61f #43 [    0.000000] Hardware name: riscv-virtio,qemu (DT) [    0.000000] Call Trace: [    0.000000] [\u003Cffffffff80007ba8\u003E] walk_stackframe\u002B0x0/0x11a [    0.000000] [\u003Cffffffff80099ecc\u003E] init_param_lock\u002B0x26/0x2a [    0.000000] [\u003Cffffffff80007c4a\u003E] walk_stackframe\u002B0xa2/0x11a [    0.000000] [\u003Cffffffff80c49c80\u003E] dump_stack_lvl\u002B0x22/0x36 [    0.000000] [\u003Cffffffff80c3783e\u003E] print_report\u002B0x198/0x4a8 [    0.000000] [\u003Cffffffff80099ecc\u003E] init_param_lock\u002B0x26/0x2a [    0.000000] [\u003Cffffffff80007c4a\u003E] walk_stackframe\u002B0xa2/0x11a [    0.000000] [\u003Cffffffff8015f68a\u003E] kasan_report\u002B0x9a/0xc8 [    0.000000] [\u003Cffffffff80007c4a\u003E] walk_stackframe\u002B0xa2/0x11a [    0.000000] [\u003Cffffffff80007c4a\u003E] walk_stackframe\u002B0xa2/0x11a [    0.000000] [\u003Cffffffff8006e99c\u003E] desc_make_final\u002B0x80/0x84 [    0.000000] [\u003Cffffffff8009a04e\u003E] stack_trace_save\u002B0x88/0xa6 [    0.000000] [\u003Cffffffff80099fc2\u003E] filter_irq_stacks\u002B0x72/0x76 [    0.000000] [\u003Cffffffff8006b95e\u003E] devkmsg_read\u002B0x32a/0x32e [    0.000000] [\u003Cffffffff8015ec16\u003E] kasan_save_stack\u002B0x28/0x52 [    0.000000] [\u003Cffffffff8006e998\u003E] desc_make_final\u002B0x7c/0x84 [    0.000000] [\u003Cffffffff8009a04a\u003E] stack_trace_save\u002B0x84/0xa6 [    0.000000] [\u003Cffffffff8015ec52\u003E] kasan_set_track\u002B0x12/0x20 [    0.000000] [\u003Cffffffff8015f22e\u003E] __kasan_slab_alloc\u002B0x58/0x5e [    0.000000] [\u003Cffffffff8015e7ea\u003E] __kmem_cache_create\u002B0x21e/0x39a [    0.000000] [\u003Cffffffff80e133ac\u003E] create_boot_cache\u002B0x70/0x9c [    0.000000] [\u003Cffffffff80e17ab2\u003E] kmem_cache_init\u002B0x6c/0x11e [    0.000000] [\u003Cffffffff80e00fd6\u003E] mm_init\u002B0xd8/0xfe [    0.000000] [\u003Cffffffff80e011d8\u003E] start_kernel\u002B0x190/0x3ca [    0.000000] [    0.000000] The buggy address belongs to stack of task swapper/0 [    0.000000]  and is located at offset 0 in frame: [    0.000000]  stack_trace_save\u002B0x0/0xa6 [    0.000000] [    0.000000] This frame has 1 object: [    0.000000]  [32, 56) \u0027c\u0027 [    0.000000] [    0.000000] The buggy address belongs to the physical page: [    0.000000] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x81a07 [    0.000000] flags: 0x1000(reserved|zone=0) [    0.000000] raw: 0000000000001000 ff600003f1e3d150 ff600003f1e3d150 0000000000000000 [    0.000000] raw: 0000000000000000 0000000000000000 00000001ffffffff [    0.000000] page dumped because: kasan: bad access detected [    0.000000] [    0.000000] Memory state around the buggy address: [    0.000000]  ffffffff81807b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [    0.000000]  ffffffff81807b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [    0.000000] \u003Effffffff81807c00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 f3 [    0.000000]                                            ^ [    0.000000]  ffffffff81807c80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 [    0.000000]  ffffffff81807d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [    0.000000] ==================================================================  Fix that by using READ_ONCE_NOCHECK when reading the stack in imprecise mode.",
  "published": "2025-05-02T16:15:32Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00193,
  "epssPercentile": 0.09032,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53135",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53135",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53135",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53135",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53135",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53135",
      "released": "2025-05-02T16:15:32Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}