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NVD / CVE Program· CNA Linux

CVE-2025-38671: i2c: qup: jump out of the loop in case of timeout

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: 0.16% (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 0d33913fce67a93c1eb83396c3c9d6b411dcab33, 42c4471b30fa203249f476dd42321cd7efb7f6a8, 89459f168b78e5c801dc8b7ad037b62898bc4f57; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.

Low priority for now. Upgrade to Linux Linux 0d33913fce67a93c1eb83396c3c9d6b411dcab33, 42c4471b30fa203249f476dd42321cd7efb7f6a8, 89459f168b78e5c801dc8b7ad037b62898bc4f57; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: i2c: qup: jump out of the loop in case of timeout Original logic only sets the return value but doesn't jump out of the loop if the bus is kept active by a client. This is not expected. A malicious or buggy i2c client can hang the kernel in this case and should be avoided. This is observed during a long time test with a PCA953x GPIO extender. Fix it by changing the logic to not only sets the return value, but also jumps out of the loop and return to the caller with -ETIMEDOUT.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 22, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 6th percentile
CWE
—

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%

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

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • 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 6.1.148
  • linux linux kernel4.17 and later · before 5.4.297
  • linux linux kernel6.7 and later · before 6.12.41
  • linux linux kernel6.13 and later · before 6.15.9
  • linux linux kernel6.2 and later · before 6.6.101
  • 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

    • 4.17affected
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before cbec4406998185e0311ae97dfacc649f9cd79b0baffected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before acfa2948be630ad857535cb36153697f3cbf9ca9affected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before d05ec13aa3eb868a60dc961b489053a643863ddcaffected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before c523bfba46c4b4d7676fb050909533a766698ecdaffected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before 0d33913fce67a93c1eb83396c3c9d6b411dcab33affected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before 42c4471b30fa203249f476dd42321cd7efb7f6a8affected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before 89459f168b78e5c801dc8b7ad037b62898bc4f57affected · git
    • fbfab1ab065879370541caf0e514987368eb41b2 and later · before a7982a14b3012527a9583d12525cd0dc9f8d8934affected · git
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.148-16.1.148-1
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-2025-38669Aug 22, 2025 · Revert "drm/gem-shmem: Use dma_buf from GEM object instance"
    22Monitor
  • ← EarlierCVE-2025-38670Aug 22, 2025 · arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack()
    28Monitor
  • Later →CVE-2025-38672Aug 22, 2025 · Revert "drm/gem-dma: Use dma_buf from GEM object instance"
    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 Linux0d33913fce67a93c1eb83396c3c9d6b411dcab33Vendor (CNA)
Linux Linux42c4471b30fa203249f476dd42321cd7efb7f6a8Vendor (CNA)
Linux Linux89459f168b78e5c801dc8b7ad037b62898bc4f57Vendor (CNA)
Linux Linuxa7982a14b3012527a9583d12525cd0dc9f8d8934Vendor (CNA)
Linux Linuxacfa2948be630ad857535cb36153697f3cbf9ca9Vendor (CNA)
Linux Linuxc523bfba46c4b4d7676fb050909533a766698ecdVendor (CNA)
Linux Linuxcbec4406998185e0311ae97dfacc649f9cd79b0bVendor (CNA)
Linux Linuxd05ec13aa3eb868a60dc961b489053a643863ddcVendor (CNA)
azl3 kernel 6.6.96.2-2 on Azure Linux 3.06.6.104.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.148-1 · 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
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)

—

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.

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