cbcvebase.
CVE-2023-53216
published 2025-09-15

CVE-2023-53216: 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…

PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.15%
4.9th percentile
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){+.+.}-{0:0}, at: process_one_work (./include/linux/atomic/atomic-long.h:41) #1: ffff80000861bdd0 ((work_completion)(&efi_rts_work.work)){+.+.}-{0:0}, at: process_one_work (./include/linux/atomic/atomic-long.h:41) #2: ffffdf7e1ed3e460 (efi_rt_lock){+.+.}-{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 ("arm64: efi: Execute runtime services from a dedicated stack") 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 'efi_rt_lock' 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/r

Affected

18 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.20-1 (bookworm)linux 6.1.20-1 (bookworm)
linuxlinux——
linuxlinux>= 4012603cbd469223f225637d265a233f034c567a < 030b1c4217a4f504c7d0795a2bd86b7181e56f11030b1c4217a4f504c7d0795a2bd86b7181e56f11
linuxlinux>= 5.10.165 < 5.10.1755.10.175
linuxlinux>= 5.15.90 < 5.15.1035.15.103
linuxlinux>= 6.1.8 < 6.1.186.1.18
linuxlinux>= de2af657cab92afc13a4ccd8780370481ed0eb61 < 6a72729ed6accc86dad5522895e8fa2f96642a2c6a72729ed6accc86dad5522895e8fa2f96642a2c
linuxlinux>= f75a91c82dc805af8f718ff106ec9c090234b37b < 8b38969fa01662ec539a0d08a8ea5ec6f31fa4ed8b38969fa01662ec539a0d08a8ea5ec6f31fa4ed
linuxlinux>= ff7a167961d1b97e0e205f245f806e564d3505e7 < 4e8f7d998b582a99aadedd07ae6086e99b89c97a4e8f7d998b582a99aadedd07ae6086e99b89c97a
linuxlinux>= ff7a167961d1b97e0e205f245f806e564d3505e7 < 0e68b5517d3767562889f1d83fdb828c26adb24f0e68b5517d3767562889f1d83fdb828c26adb24f
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 0 < 6.1.20-16.1.20-1
linuxlinux_kernel>= 5.10.165 < 5.10.1755.10.175
linuxlinux_kernel>= 5.15.90 < 5.15.1035.15.103
linuxlinux_kernel>= 6.1.8 < 6.1.186.1.18
linuxlinux_kernel>= 6.2 < 6.2.56.2.5

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.