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NVD / CVE Program· CNA Linux

CVE-2025-38530: comedi: pcl812: Fix bit shift out of bounds

Noroxi assessment

Priority: Monitor (action score 28/100)

  • 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: 0.18% (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 0489c30d080f07cc7f09d04de723d8c2ccdb61ef, 16c173abee315953fd17a279352fec4a1faee862, 29ef03e5b84431171d6b77b822985b54bc44b793; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1.

Low priority for now. Upgrade to Linux Linux 0489c30d080f07cc7f09d04de723d8c2ccdb61ef, 16c173abee315953fd17a279352fec4a1faee862, 29ef03e5b84431171d6b77b822985b54bc44b793; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1 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: comedi: pcl812: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: if ((1 << it->options[1]) & board->irq_bits) { However, `it->options[i]` is an unchecked `int` value from userspace, so the shift amount could be negative or out of bounds. Fix the test by requiring `it->options[1]` to be within bounds before proceeding with the original test. Valid `it->options[1]` values that select the IRQ will be in the range [1,15]. The value 0 explicitly disables the use of interrupts.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
Aug 16, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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

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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

Affected versions

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 kernel5.5 and later · before 5.10.241
  • linux linux kernel5.11 and later · before 5.15.190
  • linux linux kernel5.16 and later · before 6.1.147
  • linux linux kernel2.6.30 and later · before 5.4.297
  • linux linux kernel6.7 and later · before 6.12.40
  • linux linux kernel6.13 and later · before 6.15.8
  • linux linux kernel6.2 and later · before 6.6.100
  • linux linux kernel6.16

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

    • 2.6.30affected
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before 374d9b3eb4b08407997ef1fce96119d31e0c0bc4affected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before 0489c30d080f07cc7f09d04de723d8c2ccdb61efaffected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before 29ef03e5b84431171d6b77b822985b54bc44b793affected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before 5bfa301e1e59a9b1a7b62a800b54852337c97416affected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before 7e470d8efd10725b189ca8951973a8425932398aaffected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before a27e27eee313fe1c450b6af1e80e64412546cab4affected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before 16c173abee315953fd17a279352fec4a1faee862affected · git
    • fcdb427bc7cf5e9e5d7280cf09c08dec49b49432 and later · before b14b076ce593f72585412fc7fd3747e03a5e3632affected · git
    • before 2.6.30not affected · semver

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 6.12.41-16.12.41-1
Debian:14linuxbefore 6.16.3-16.16.3-1

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-2025-38525Aug 16, 2025 · rxrpc: Fix irq-disabled in local_bh_enable()
    22Monitor
  • ← EarlierCVE-2025-38529Aug 16, 2025 · comedi: aio_iiro_16: Fix bit shift out of bounds
    28Monitor
  • Later →CVE-2025-38532Aug 16, 2025 · net: libwx: properly reset Rx ring descriptor
    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 Linux0489c30d080f07cc7f09d04de723d8c2ccdb61efVendor (CNA)
Linux Linux16c173abee315953fd17a279352fec4a1faee862Vendor (CNA)
Linux Linux29ef03e5b84431171d6b77b822985b54bc44b793Vendor (CNA)
Linux Linux374d9b3eb4b08407997ef1fce96119d31e0c0bc4Vendor (CNA)
Linux Linux5bfa301e1e59a9b1a7b62a800b54852337c97416Vendor (CNA)
Linux Linux7e470d8efd10725b189ca8951973a8425932398aVendor (CNA)
Linux Linuxa27e27eee313fe1c450b6af1e80e64412546cab4Vendor (CNA)
Linux Linuxb14b076ce593f72585412fc7fd3747e03a5e3632Vendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · 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.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

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
high · data can be read
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
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (9 more)

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

All records