What is CVE-2023-53656?

CVE-2023-53656 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.17 onward and patched in 6.1.39, 6.3.13, 6.4.4 and others. CVE-2023-53656 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53656?

CVE-2023-53656 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-53656?

Yes, CVE-2023-53656 has been patched. Fixed versions include 6.1.39, 6.3.13, 6.4.4 and others. If you are running Linux kernel 5.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53656 actively exploited?

CVE-2023-53656 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53656

Medium

In the Linux kernel, the following vulnerability has been resolved: drivers/perf: hisi: Don't migrate perf to the CPU going to teardown The driver needs to migrate the perf context if the current using CPU going to teardown. By the time calling the cpuhp::teardown() callback the cpu_online_mask() hasn't updated yet and still includes the CPU going to teardown. In current driver's implementation we may migrate the context to the teardown CPU and leads to the below calltrace: ... [ 368.104662][ T932] task:cpuhp/0 state:D stack: 0 pid: 15 ppid: 2 flags:0x00000008 [ 368.113699][ T932] Call trace: [ 368.116834][ T932] __switch_to+0x7c/0xbc [ 368.120924][ T932] __schedule+0x338/0x6f0 [ 368.125098][ T932] schedule+0x50/0xe0 [ 368.128926][ T932] schedule_preempt_disabled+0x18/0x24 [ 368.134229][ T932] __mutex_lock.constprop.0+0x1d4/0x5dc [ 368.139617][ T932] __mutex_lock_slowpath+0x1c/0x30 [ 368.144573][ T932] mutex_lock+0x50/0x60 [ 368.148579][ T932] perf_pmu_migrate_context+0x84/0x2b0 [ 368.153884][ T932] hisi_pcie_pmu_offline_cpu+0x90/0xe0 [hisi_pcie_pmu] [ 368.160579][ T932] cpuhp_invoke_callback+0x2a0/0x650 [ 368.165707][ T932] cpuhp_thread_fun+0xe4/0x190 [ 368.170316][ T932] smpboot_thread_fn+0x15c/0x1a0 [ 368.175099][ T932] kthread+0x108/0x13c [ 368.179012][ T932] ret_from_fork+0x10/0x18 ... Use function cpumask_any_but() to find one correct active cpu to fixes this issue.

Package Linux Kernel

Published 2025-10-07

Last modified 2026-02-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.17 and later are affected. Fixed in 6.1.39, 6.3.13, 6.4.4, 6.5 and their respective stable series.

Affected from

≥ 5.17

Fixed in

✓ 6.1.39 6.1.x ✓ 6.3.13 6.3.x ✓ 6.4.4 6.4.x ✓ 6.5

References

The following references provide additional information about CVE-2023-53656 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/7a6a9f1c5a0a875a421db798d4b2ee022dc1ee1a
Patch
Kernel patch commit
https://git.kernel.org/stable/c/b64569897d86b611befbb895d815280fea94e1ed
Patch
Kernel patch commit
https://git.kernel.org/stable/c/be9c8c9c84b6d25a7b7d39954030aba6f759feb6
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2023-53656

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-10-07

Modified 2026-02-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53656?

CVE-2023-53656 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.17 onward and has been patched in 6.1.39, 6.3.13, 6.4.4 and others. CVE-2023-53656 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53656?

CVE-2023-53656 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-53656?

Yes — CVE-2023-53656 has been patched. Fixed versions include 6.1.39, 6.3.13, 6.4.4 and others. If you are running Linux kernel 5.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53656 actively exploited?

No — CVE-2023-53656 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.