Review reviewHigh

CVE-2023-53713

Linux

In the Linux kernel, the following vulnerability has been resolved: arm64: sme: Use STR P to clear FFR context field in streaming SVE mode The FFR is a predicate register which can vary between 16 and 256 bits in size depending upon the configured vector length. When saving the SVE state in streaming SVE mode, the FFR register is inaccessible and so commit 9f5848665788 ("arm64/sve: Make access to FFR optional") simply clears the FFR field of the in-memory context structure. Unfortunately, it achieves this using an unconditional 8-byte store and so if the SME vector length is anything other...

CVSS: 7.8
EPSS: 0.14%
CISA KEV: Not listed
Published: 2025.10.22

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.14%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 9f5848665788a0f07bc175cb2cdd06d367b7556e < 97669214944e80d3756657c21c4f286f3da6a423, >= 9f5848665788a0f07bc175cb2cdd06d367b7556e < 8769a62faacbbb6cac5e35d9047ce445183d4e9f, >= 9f5848665788a0f07bc175cb2cdd06d367b7556e < 1403a899153a12d93fd510e463fd6d0eafba4336, >= 9f5848665788a0f07bc175cb2cdd06d367b7556e < 893b24181b4c4bf1fa2841b1ed192e5413a97cb1, >= 5.16
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available