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NVD / CVE Program· CNA Linux

CVE-2025-38113: ACPI: CPPC: Fix NULL pointer dereference when nosmp is used

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12, 1a677d0ceb4a5d62117b711a8b2e0aee80d33015, 32a48db4cf28ea087214c261da8476db218d08bd; azl3 kernel 6.6.92.2-2 on Azure Linux 3.0 6.6.96.1-1; azl3 kernel 6.6.96.1-1 on Azure Linux 3.0 6.6.96.1-1.

Low priority for now. Upgrade to Linux Linux 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12, 1a677d0ceb4a5d62117b711a8b2e0aee80d33015, 32a48db4cf28ea087214c261da8476db218d08bd; azl3 kernel 6.6.92.2-2 on Azure Linux 3.0 6.6.96.1-1; azl3 kernel 6.6.96.1-1 on Azure Linux 3.0 6.6.96.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Fix NULL pointer dereference when nosmp is used With nosmp in cmdline, other CPUs are not brought up, leaving their cpc_desc_ptr NULL. CPU0's iteration via for_each_possible_cpu() dereferences these NULL pointers, causing panic. Panic backtrace: [ 0.401123] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8 ... [ 0.403255] [<ffffffff809a5818>] cppc_allow_fast_switch+0x6a/0xd4 ... Kernel panic - not syncing: Attempted to kill init! [ rjw: New subject ]

Published
Jul 3, 2025
Updated
Nov 5, 2026
EPSS
0.1% · 9th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-38113

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
debiandebian linux

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.19affected
    • 3cc30dd00a580ca0c9c0b01639841cfd72d10129 and later · before 356d09c7f5bf525086002a34f8bae40b134d1611affected · git
    • 3cc30dd00a580ca0c9c0b01639841cfd72d10129 and later · before c6dad167aade4bf0bef9130f2f149f4249fc4ad0affected · git
    • 3cc30dd00a580ca0c9c0b01639841cfd72d10129 and later · before 32a48db4cf28ea087214c261da8476db218d08bdaffected · git
    • 3cc30dd00a580ca0c9c0b01639841cfd72d10129 and later · before 1a677d0ceb4a5d62117b711a8b2e0aee80d33015affected · git
    • 3cc30dd00a580ca0c9c0b01639841cfd72d10129 and later · before 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12affected · git
    • before 5.19not affected · semver
    • 6.1.142 and later · up to and including 6.1.*not affected · semver
    • 6.6.94 and later · up to and including 6.6.*not affected · semver
    • 6.12.34 and later · up to and including 6.12.*not affected · semver
Affected versions · NVD (6)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • linux linux kernel5.19 and later · before 6.1.142
  • linux linux kernel6.2 and later · before 6.6.94
  • linux linux kernel6.7 and later · before 6.12.34
  • linux linux kernel6.13 and later · before 6.15.3
  • linux linux kernel6.16

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.147-16.1.147-1
Debian:13linuxbefore 6.12.35-16.12.35-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-38111Jul 3, 2025 · net/mdiobus: Fix potential out-of-bounds read/write access
    28Monitor
  • ← EarlierCVE-2025-38112Jul 3, 2025 · net: Fix TOCTOU issue in sk_is_readable()
    18Monitor
  • Later →CVE-2025-38115Jul 3, 2025 · net_sched: sch_sfq: fix a potential crash on gso_skb handling
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12Vendor (CNA)
Linux Linux1a677d0ceb4a5d62117b711a8b2e0aee80d33015Vendor (CNA)
Linux Linux32a48db4cf28ea087214c261da8476db218d08bdVendor (CNA)
Linux Linux356d09c7f5bf525086002a34f8bae40b134d1611Vendor (CNA)
Linux Linuxc6dad167aade4bf0bef9130f2f149f4249fc4ad0Vendor (CNA)
azl3 kernel 6.6.92.2-2 on Azure Linux 3.06.6.96.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.96.1-1 on Azure Linux 3.06.6.96.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.147-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records