{
  "cveId": "CVE-2023-53216",
  "url": "https://patchblox.com/security/cve/CVE-2023-53216",
  "summary": "CVE-2023-53216 is fixed in 20 products on 1 platform, first by ALAS2023-2023-138, released March 20, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  arm64: efi: Make efi_rt_lock a raw_spinlock  Run...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  arm64: efi: Make efi_rt_lock a raw_spinlock  Running a rt-kernel base on 6.2.0-rc3-rt1 on an Ampere Altra outputs the following:   BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46   in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 9, name: kworker/u320:0   preempt_count: 2, expected: 0   RCU nest depth: 0, expected: 0   3 locks held by kworker/u320:0/9:   #0: ffff3fff8c27d128 ((wq_completion)efi_rts_wq){\u002B.\u002B.}-{0:0}, at: process_one_work (./include/linux/atomic/atomic-long.h:41)   #1: ffff80000861bdd0 ((work_completion)(\u0026efi_rts_work.work)){\u002B.\u002B.}-{0:0}, at: process_one_work (./include/linux/atomic/atomic-long.h:41)   #2: ffffdf7e1ed3e460 (efi_rt_lock){\u002B.\u002B.}-{3:3}, at: efi_call_rts (drivers/firmware/efi/runtime-wrappers.c:101)   Preemption disabled at:   efi_virtmap_load (./arch/arm64/include/asm/mmu_context.h:248)   CPU: 0 PID: 9 Comm: kworker/u320:0 Tainted: G        W          6.2.0-rc3-rt1   Hardware name: WIWYNN Mt.Jade Server System B81.03001.0005/Mt.Jade Motherboard, BIOS 1.08.20220218 (SCP: 1.08.20220218) 2022/02/18   Workqueue: efi_rts_wq efi_call_rts   Call trace:   dump_backtrace (arch/arm64/kernel/stacktrace.c:158)   show_stack (arch/arm64/kernel/stacktrace.c:165)   dump_stack_lvl (lib/dump_stack.c:107 (discriminator 4))   dump_stack (lib/dump_stack.c:114)   __might_resched (kernel/sched/core.c:10134)   rt_spin_lock (kernel/locking/rtmutex.c:1769 (discriminator 4))   efi_call_rts (drivers/firmware/efi/runtime-wrappers.c:101)   [...]  This seems to come from commit ff7a167961d1 (\u0022arm64: efi: Execute runtime services from a dedicated stack\u0022) which adds a spinlock. This spinlock is taken through: efi_call_rts() \\-efi_call_virt()   \\-efi_call_virt_pointer()     \\-arch_efi_call_virt_setup()  Make \u0027efi_rt_lock\u0027 a raw_spinlock to avoid being preempted.  [ardb: The EFI runtime services are called with a different set of        translation tables, and are permitted to use the SIMD registers.        The context switch code preserves/restores neither, and so EFI        calls must be made with preemption disabled, rather than only        disabling migration.]",
  "published": "2023-03-20T18:27:00Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00168,
  "epssPercentile": 0.06055,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.19-30.43",
      "release": "amzn 2023",
      "fixedVersion": "1.0-0.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53216",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53216",
      "released": "2025-09-15T15:15:48Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53216",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53216",
      "released": "2025-09-15T15:15:48Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53216",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53216",
      "released": "2025-09-15T15:15:48Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.19-30.43.amzn2023",
      "fix": "ALAS2023-2023-138",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-138",
      "released": "2023-03-20T18:27:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}