What is CVE-2023-53859?

CVE-2023-53859 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.19.297 onward and patched in 5.15.99, 6.1.16, 6.2.3 and others. CVE-2023-53859 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53859?

CVE-2023-53859 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-53859?

Yes, CVE-2023-53859 has been patched. Fixed versions include 5.15.99, 6.1.16, 6.2.3 and others. If you are running Linux kernel 4.19.297 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53859 actively exploited?

CVE-2023-53859 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53859

In the Linux kernel, the following vulnerability has been resolved: s390/idle: mark arch_cpu_idle() noinstr linux-next commit ("cpuidle: tracing: Warn about !rcu_is_watching()") adds a new warning which hits on s390's arch_cpu_idle() function: RCU not on for: arch_cpu_idle+0x0/0x28 WARNING: CPU: 2 PID: 0 at include/linux/trace_recursion.h:162 arch_ftrace_ops_list_func+0x24c/0x258 Modules linked in: CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.2.0-rc6-next-20230202 #4 Hardware name: IBM 8561 T01 703 (z/VM 7.3.0) Krnl PSW : 0404d00180000000 00000000002b55c0 (arch_ftrace_ops_list_func+0x250/0x258) R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 RI:0 EA:3 Krnl GPRS: c0000000ffffbfff 0000000080000002 0000000000000026 0000000000000000 0000037ffffe3a28 0000037ffffe3a20 0000000000000000 0000000000000000 0000000000000000 0000000000f4acf6 00000000001044f0 0000037ffffe3cb0 0000000000000000 0000000000000000 00000000002b55bc 0000037ffffe3bb8 Krnl Code: 00000000002b55b0: c02000840051 larl %r2,0000000001335652 00000000002b55b6: c0e5fff512d1 brasl %r14,0000000000157b58 #00000000002b55bc: af000000 mc 0,0 >00000000002b55c0: a7f4ffe7 brc 15,00000000002b558e 00000000002b55c4: 0707 bcr 0,%r7 00000000002b55c6: 0707 bcr 0,%r7 00000000002b55c8: eb6ff0480024 stmg %r6,%r15,72(%r15) 00000000002b55ce: b90400ef lgr %r14,%r15 Call Trace: [<00000000002b55c0>] arch_ftrace_ops_list_func+0x250/0x258 ([<00000000002b55bc>] arch_ftrace_ops_list_func+0x24c/0x258) [<0000000000f5f0fc>] ftrace_common+0x1c/0x20 [<00000000001044f6>] arch_cpu_idle+0x6/0x28 [<0000000000f4acf6>] default_idle_call+0x76/0x128 [<00000000001cc374>] do_idle+0xf4/0x1b0 [<00000000001cc6ce>] cpu_startup_entry+0x36/0x40 [<0000000000119d00>] smp_start_secondary+0x140/0x150 [<0000000000f5d2ae>] restart_int_handler+0x6e/0x90 Mark arch_cpu_idle() noinstr like all other architectures with CONFIG_ARCH_WANTS_NO_INSTR (should) have it to fix this.

Package Linux Kernel

Published 2025-12-09

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.19.297, 5.9 and later are affected. Fixed in 5.15.99, 6.1.16, 6.2.3, 6.3 and their respective stable series.

Affected from

≥ 4.19.297 ≥ 5.9

Fixed in

✓ 5.15.99 5.15.x ✓ 6.1.16 6.1.x ✓ 6.2.3 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-53859 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/49aa49952116b8fd56bfb1e8c69bce179f49bece
Patch
Kernel patch commit
https://git.kernel.org/stable/c/611c390217106c46e24e1af3db83187339d447ea
Patch
Kernel patch commit
https://git.kernel.org/stable/c/a9cbc1b471d291c865907542394f1c483b93a811
Patch

4 patch commits total View all on NVD

Frequently asked questions

What is CVE-2023-53859?

CVE-2023-53859 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.19.297 onward and has been patched in 5.15.99, 6.1.16, 6.2.3 and others. CVE-2023-53859 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-53859?

Yes — CVE-2023-53859 has been patched. Fixed versions include 5.15.99, 6.1.16, 6.2.3 and others. If you are running Linux kernel 4.19.297 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53859 actively exploited?

No — CVE-2023-53859 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.