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Review reviewHigh

CVE-2025-21785

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array The loop that detects/populates cache information already has a bounds check on the array size but does not account for cache levels with separate data/instructions cache. Fix this by incrementing the index for any populated leaf (instead of any populated level).

CVSS
7.8
EPSS
0.27%
18.7% percentile
CISA KEV
Not listed
Published
2025.02.27
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.27%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array The loop that detects/populates cache information already has a bounds check on the array size but does not account for cache levels with separate data/instructions cache. Fix this by incrementing the index for any populated leaf (instead of any populated level).

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 5d425c18653731af62831d30a4fa023d532657a9 < 4371ac7b494e933fffee2bd6265d18d73c4f05aa, >= 5d425c18653731af62831d30a4fa023d532657a9 < e4fde33107351ec33f1a64188612fbc6ca659284, >= 5d425c18653731af62831d30a4fa023d532657a9 < 88a3e6afaf002250220793df99404977d343db14, >= 5d425c18653731af62831d30a4fa023d532657a9 < 4ff25f0b18d1d0174c105e4620428bcdc1213860, >= 5d425c18653731af62831d30a4fa023d532657a9 < ab90894f33c15b14c1cee6959ab6c8dcb09127f8, >= 5d425c18653731af62831d30a4fa023d532657a9 < 715eb1af64779e1b1aa0a7b2ffb81414d9f708e5, >= 5d425c18653731af62831d30a4fa023d532657a9 < 67b99a2b5811df4294c2ad50f9bff3b6a08bd618, >= 5d425c18653731af62831d30a4fa023d532657a9 < 875d742cf5327c93cba1f11e12b08d3cce7a88d2, >= 4.0, >= 4.0 < 6.1.129, >= 6.2 < 6.6.79, >= 6.7 < 6.12.16, >= 6.13 < 6.13.4, 6.14
Fixed versions
6.1.129, 6.6.79, 6.12.16, 6.13.4

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