{
  "cveId": "CVE-2026-72028",
  "url": "https://patchblox.com/security/cve/CVE-2026-72028",
  "summary": "CVE-2026-72028 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-72028, released August 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: probes: save original sp in rethook tramp...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  riscv: probes: save original sp in rethook trampoline  Reading a word from the stack in a kretprobe crashes a risc-v kernel.  $ cd /sys/kernel/tracing/ $ echo \u0027r n_tty_write $stack0\u0027 \u003E dynamic_events $ echo 1 \u003E events/kprobes/enable Unable to handle kernel paging request at virtual address 0000000200000128 ... [\u003Cffffffff80016d16\u003E] regs_get_kernel_stack_nth\u002B0x26/0x38 [\u003Cffffffff80177196\u003E] process_fetch_insn\u002B0x3ee/0x760 [\u003Cffffffff80177836\u003E] kretprobe_trace_func\u002B0x116/0x1f0 [\u003Cffffffff8017795a\u003E] kretprobe_dispatcher\u002B0x4a/0x58 [\u003Cffffffff8013572e\u003E] kretprobe_rethook_handler\u002B0x5e/0x90 [\u003Cffffffff80180838\u003E] rethook_trampoline_handler\u002B0x70/0x108 [\u003Cffffffff8001ba32\u003E] arch_rethook_trampoline_callback\u002B0x12/0x1c [\u003Cffffffff8001ba84\u003E] arch_rethook_trampoline\u002B0x48/0x94 [\u003Cffffffff8067872a\u003E] tty_write\u002B0x1a/0x30  In regs_get_kernel_stack_nth, regs-\u003Esp contains an arbitrary value.  arch_rethook_trampoline saves the registers from the probed function in a struct pt_regs. sp is not saved. Instead, sp is decremented for arch_rethook_trampoline\u0027s local stack.  Fix this crash and save the original sp along with the other registers. Use a0 as a temporary register, it is overwritten anyway.  [pjw@kernel.org: added Fixes tag; cc\u0027ed stable]",
  "published": "2026-08-15T06:21:01Z",
  "severity": "",
  "epss": 0.00215,
  "epssPercentile": 0.11905,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.100-1",
      "fix": "DEBIAN-CVE-2026-72028",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72028",
      "released": "2026-08-15T22:38:55Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-72028",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72028",
      "released": "2026-08-15T22:38:55Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}