What is CVE-2023-53703?

CVE-2023-53703 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.0 onward and patched in 6.1.40, 6.4.5 and 6.5. CVE-2023-53703 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53703?

CVE-2023-53703 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-53703?

Yes, CVE-2023-53703 has been patched. Fixed versions include 6.1.40, 6.4.5 and 6.5. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53703 actively exploited?

CVE-2023-53703 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53703

In the Linux kernel, the following vulnerability has been resolved: HID: amd_sfh: Fix for shift-out-of-bounds Shift operation of 'exp' and 'shift' variables exceeds the maximum number of shift values in the u32 range leading to UBSAN shift-out-of-bounds. ... [ 6.120512] UBSAN: shift-out-of-bounds in drivers/hid/amd-sfh-hid/sfh1_1/amd_sfh_desc.c:149:50 [ 6.120598] shift exponent 104 is too large for 64-bit type 'long unsigned int' [ 6.120659] CPU: 4 PID: 96 Comm: kworker/4:1 Not tainted 6.4.0amd_1-next-20230519-dirty #10 [ 6.120665] Hardware name: AMD Birman-PHX/Birman-PHX, BIOS SFH_with_HPD_SEN.FD 04/05/2023 [ 6.120667] Workqueue: events amd_sfh_work_buffer [amd_sfh] [ 6.120687] Call Trace: [ 6.120690] <TASK> [ 6.120694] dump_stack_lvl+0x48/0x70 [ 6.120704] dump_stack+0x10/0x20 [ 6.120707] ubsan_epilogue+0x9/0x40 [ 6.120716] __ubsan_handle_shift_out_of_bounds+0x10f/0x170 [ 6.120720] ? psi_group_change+0x25f/0x4b0 [ 6.120729] float_to_int.cold+0x18/0xba [amd_sfh] [ 6.120739] get_input_rep+0x57/0x340 [amd_sfh] [ 6.120748] ? __schedule+0xba7/0x1b60 [ 6.120756] ? __pfx_get_input_rep+0x10/0x10 [amd_sfh] [ 6.120764] amd_sfh_work_buffer+0x91/0x180 [amd_sfh] [ 6.120772] process_one_work+0x229/0x430 [ 6.120780] worker_thread+0x4a/0x3c0 [ 6.120784] ? __pfx_worker_thread+0x10/0x10 [ 6.120788] kthread+0xf7/0x130 [ 6.120792] ? __pfx_kthread+0x10/0x10 [ 6.120795] ret_from_fork+0x29/0x50 [ 6.120804] </TASK> ... Fix this by adding the condition to validate shift ranges.

Package Linux Kernel

Published 2025-10-22

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.1.40, 6.4.5, 6.5 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.1.40 6.1.x ✓ 6.4.5 6.4.x ✓ 6.5

References

The following references provide additional information about CVE-2023-53703 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/1e50bc2c177d4b2953d77037ac46ea0702d6aa1f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5a45ed1ae34bb0e68944471f4bafb68e0a572791
Patch
Kernel patch commit
https://git.kernel.org/stable/c/87854366176403438d01f368b09de3ec2234e0f5
Patch

Frequently asked questions

What is CVE-2023-53703?

CVE-2023-53703 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.0 onward and has been patched in 6.1.40, 6.4.5 and 6.5. CVE-2023-53703 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-53703?

Yes — CVE-2023-53703 has been patched. Fixed versions include 6.1.40, 6.4.5 and 6.5. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53703 actively exploited?

No — CVE-2023-53703 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.