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Linux KernelOperating system · Linux

CVE-2025-38195

MEDIUM · 5.5 CVSS v3.1 Published 2025-07-04
Fix available
A fix is available. Upgrade to 6.2 / 6.6.95 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: LoongArch: Fix panic caused by NULL-PMD in huge_pte_offset() ERROR INFO: CPU 25 Unable to handle kernel paging request at virtual address 0x0 ... Call Trace: [<900000000023c30c>] huge_pte_offset+0x3c/0x58 [<900000000057fd4c>] hugetlb_follow_page_mask+0x74/0x438 [<900000000051fee8>] __get_user_pages+0xe0/0x4c8 [<9000000000522414>] faultin_page_range+0x84/0x380 [<9000000000564e8c>] madvise_vma_behavior+0x534/0xa48 [<900000000056689c>] do_madvise+0x1bc/0x3e8 [<9000000000566df4>] sys_madvise+0x24/0x38 [<90000000015b9e88>] do_syscall+0x78/0x98 [<9000000000221f18>] handle_syscall+0xb8/0x158 In some cases, pmd may be NULL and rely on NULL as the return value for processing, so it is necessary to determine this situation here.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 6.1.136, < 6.2>= 6.6.89, < 6.6.95>= 6.12.26, < 6.12.35>= 6.14.5, < 6.15>= 6.15.1, < 6.15.4= 6.15

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.2 / 6.6.95 / 6.12.35 or later
Fixed in 6.26.6.956.12.35
Vendor patch git.kernel.org →
Recommended fix High confidence

6.15 (or 6.6.95/6.12.35 depending on your branch)

  1. Identify your current kernel version using `uname -r`
  2. Determine which version range your kernel falls into from the affected versions: 6.1.x, 6.6.x, 6.12.x, or 6.14.x
  3. For kernels >= 6.1.136 and < 6.2: Upgrade to kernel version 6.2 or later
  4. For kernels >= 6.6.89 and < 6.6.95: Upgrade to kernel version 6.6.95 or later
  5. For kernels >= 6.12.26 and < 6.12.35: Upgrade to kernel version 6.12.35 or later
  6. For kernels >= 6.14.5 and < 6.15: Upgrade to kernel version 6.15 or later
  7. Apply the upgrade via your distribution's package manager (e.g., `apt update && apt upgrade`, `yum update`, or `dnf upgrade`)
  8. Reboot the system to load the new kernel
Caveat Kernel upgrades may require reboot and could introduce compatibility changes with out-of-tree modules or specific hardware drivers

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-38195 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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