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NVD / CVE Program· CNA Linux

CVE-2025-21656: hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur

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: 0.20% (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 0435d35f9d511fa5ddba49c9f68f947e395c93f9, 42268d885e44af875a6474f7bba519cc6cea6a9d, 53e25b10a28edaf8c2a1d3916fd8929501a50dfc.

Low priority for now. Upgrade to Linux Linux 0435d35f9d511fa5ddba49c9f68f947e395c93f9, 42268d885e44af875a6474f7bba519cc6cea6a9d, 53e25b10a28edaf8c2a1d3916fd8929501a50dfc 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: hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur scsi_execute_cmd() function can return both negative (linux codes) and positive (scsi_cmnd result field) error codes. Currently the driver just passes error codes of scsi_execute_cmd() to hwmon core, which is incorrect because hwmon only checks for negative error codes. This leads to hwmon reporting uninitialized data to userspace in case of SCSI errors (for example if the disk drive was disconnected). This patch checks scsi_execute_cmd() output and returns -EIO if it's error code is positive. [groeck: Avoid inline variable declaration for portability]

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jan 21, 2025
Updated
Oct 30, 2026
EPSS
0.2% · 10th 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 · 0.2%

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.

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When you'll hear from us

  • when it enters CISA KEV
  • 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

Affected versions

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

  • linux linux kernel5.6 and later · before 6.6.72
  • linux linux kernel6.7 and later · before 6.12.10
  • linux linux kernel6.13

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

    • 5.6affected
    • 5b46903d8bf372e563bf2150d46b87fff197a109 and later · before babdf2a11329d30dc5086eb7a938a360aa490282affected · git
    • 5b46903d8bf372e563bf2150d46b87fff197a109 and later · before 0435d35f9d511fa5ddba49c9f68f947e395c93f9affected · git
    • 5b46903d8bf372e563bf2150d46b87fff197a109 and later · before f9723fd2770ef5563ff1685f72bcc1c411219c29affected · git
    • 5b46903d8bf372e563bf2150d46b87fff197a109 and later · before 53e25b10a28edaf8c2a1d3916fd8929501a50dfcaffected · git
    • 5b46903d8bf372e563bf2150d46b87fff197a109 and later · before 42268d885e44af875a6474f7bba519cc6cea6a9daffected · git
    • 5b46903d8bf372e563bf2150d46b87fff197a109 and later · before 82163d63ae7a4c36142cd252388737205bb7e4b9affected · git
    • before 5.6not affected · semver
    • 5.10.273 and later · up to and including 5.10.*not affected · semver
    • 5.15.224 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.10-16.12.10-1

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-2024-57936Jan 21, 2025 · RDMA/bnxt_re: Fix max SGEs for the Work Request
    22Monitor
  • ← EarlierCVE-2024-57940Jan 21, 2025 · exfat: fix the infinite loop in exfat_readdir()
    22Monitor
  • Later →CVE-2025-21658Jan 21, 2025 · btrfs: avoid NULL pointer dereference if no valid extent tree
    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 Linux0435d35f9d511fa5ddba49c9f68f947e395c93f9Vendor (CNA)
Linux Linux42268d885e44af875a6474f7bba519cc6cea6a9dVendor (CNA)
Linux Linux53e25b10a28edaf8c2a1d3916fd8929501a50dfcVendor (CNA)
Linux Linux82163d63ae7a4c36142cd252388737205bb7e4b9Vendor (CNA)
Linux Linuxbabdf2a11329d30dc5086eb7a938a360aa490282Vendor (CNA)
Linux Linuxf9723fd2770ef5563ff1685f72bcc1c411219c29Vendor (CNA)
debian:linux6.12.10-1 · Debian:13Package 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 (5 more)

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

All records