CVE-2025-21785: arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
First published: Thu Feb 27 2025(Updated: )
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).
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| >=4.0<6.1.129 | ||
| >=6.2<6.6.79 | ||
| >=6.7<6.12.16 | ||
| >=6.13<6.13.4 | ||
| =6.14-rc1 | ||
| =6.14-rc2 |
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Reference Links
- https://git.kernel.org/stable/c/4371ac7b494e933fffee2bd6265d18d73c4f05aa
- https://git.kernel.org/stable/c/4ff25f0b18d1d0174c105e4620428bcdc1213860
- https://git.kernel.org/stable/c/67b99a2b5811df4294c2ad50f9bff3b6a08bd618
- https://git.kernel.org/stable/c/715eb1af64779e1b1aa0a7b2ffb81414d9f708e5
- https://git.kernel.org/stable/c/875d742cf5327c93cba1f11e12b08d3cce7a88d2
- https://git.kernel.org/stable/c/88a3e6afaf002250220793df99404977d343db14
- https://git.kernel.org/stable/c/ab90894f33c15b14c1cee6959ab6c8dcb09127f8
- https://git.kernel.org/stable/c/e4fde33107351ec33f1a64188612fbc6ca659284
- https://lore.kernel.org/linux-cve-announce/2025022608-CVE-2025-21785-184c@gregkh/T
- https://access.redhat.com/errata/RHSA-2025:3127
- https://access.redhat.com/errata/RHSA-2025:3128
- https://access.redhat.com/errata/RHSA-2025:3209
- https://access.redhat.com/errata/RHSA-2025:3214
- https://access.redhat.com/errata/RHSA-2025:3207
- https://access.redhat.com/errata/RHSA-2025:3211
- https://access.redhat.com/errata/RHSA-2025:3212
- https://access.redhat.com/errata/RHSA-2025:3213
- https://access.redhat.com/errata/RHSA-2025:3208
- https://access.redhat.com/errata/RHSA-2025:3216
- https://access.redhat.com/errata/RHSA-2025:3215
- https://access.redhat.com/errata/RHSA-2025:3264
- https://access.redhat.com/errata/RHSA-2025:3260
- https://bugzilla.redhat.com/show_bug.cgi?id=2348630
Frequently Asked Questions
What is the severity of CVE-2025-21785?
CVE-2025-21785 is classified with a high severity level due to the risk of out-of-bounds writes that could potentially lead to memory corruption.
How do I fix CVE-2025-21785?
To fix CVE-2025-21785, update to the latest patched version of the Linux kernel provided by your operating system vendor.
What versions of the Linux kernel are affected by CVE-2025-21785?
CVE-2025-21785 affects certain versions of the Linux kernel where cache information processing does not properly validate bounds.
Can CVE-2025-21785 be exploited remotely?
Exploitation of CVE-2025-21785 typically requires local access to the system, making remote exploitation unlikely.
What are the implications of CVE-2025-21785 if left unpatched?
If left unpatched, CVE-2025-21785 could lead to system instability, data corruption, or unauthorized access to system resources.
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