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Review reviewHigh

CVE-2023-53184

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: arm64/sme: Set new vector length before reallocating As part of fixing the allocation of the buffer for SVE state when changing SME vector length we introduced an immediate reallocation of the SVE state, this is also done when changing the SVE vector length for consistency. Unfortunately this reallocation is done prior to writing the new vector length to the task struct, meaning the allocation is done with the old vector length and can lead to memory corruption due to an undersized buffer being used. Move the update of the...

CVSS
7.8
EPSS
0.15%
4.78% percentile
CISA KEV
Not listed
Published
2025.09.15
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: arm64/sme: Set new vector length before reallocating As part of fixing the allocation of the buffer for SVE state when changing SME vector length we introduced an immediate reallocation of the SVE state, this is also done when changing the SVE vector length for consistency. Unfortunately this reallocation is done prior to writing the new vector length to the task struct, meaning the allocation is done with the old vector length and can lead to memory corruption due to an undersized buffer being used. Move the update of the...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= aa5cf8bd1318b6e7d500668b318c07a71cde783b < 356e711640aea6ed145da9407499388b45264cb4, >= 292f0453b0d021bb1d3f64648bfdfca093512214 < 807ada0e4aa3c9090c66009a99fa530c462012c9, >= d4d5be94a87872421ea2569044092535aff0b886 < 05d881b85b48c7ac6a7c92ce00aa916c4a84d052, >= 6.1.42 < 6.1.43, >= 6.4.7 < 6.4.8, 6.1.42, 6.4.7, 6.5
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. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 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
CWE-787
CVE-2023-53184 — Linux Linux, linux kernel | SECUFOCUS NOW