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NVD / CVE Program· CNA Linux

CVE-2026-31401: HID: bpf: prevent buffer overflow in hid_hw_request

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.13% (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 2b658c1c442ec1cd9eec5ead98d68662c40fe645, 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1, d6efaa50af62fb0790dd1fd4e7e5506b46312510.

Low priority for now. Upgrade to Linux Linux 2b658c1c442ec1cd9eec5ead98d68662c40fe645, 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1, d6efaa50af62fb0790dd1fd4e7e5506b46312510 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: HID: bpf: prevent buffer overflow in hid_hw_request right now the returned value is considered to be always valid. However, when playing with HID-BPF, the return value can be arbitrary big, because it's the return value of dispatch_hid_bpf_raw_requests(), which calls the struct_ops and we have no guarantees that the value makes sense.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Apr 3, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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 kernel6.11 and later · before 6.12.78
  • linux linux kernel6.13 and later · before 6.18.20
  • linux linux kernel6.19 and later · before 6.19.10
  • linux linux kernel7.0

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

    • 6.11affected
    • 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 and later · before d6efaa50af62fb0790dd1fd4e7e5506b46312510affected · git
    • 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 and later · before 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1affected · git
    • 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 and later · before eb57dae20fdf6f3069cdc07821fa3bb46de381d7affected · git
    • 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 and later · before 2b658c1c442ec1cd9eec5ead98d68662c40fe645affected · git
    • before 6.11not affected · semver
    • 6.12.78 and later · up to and including 6.12.*not affected · semver
    • 6.18.20 and later · up to and including 6.18.*not affected · semver
    • 6.19.10 and later · up to and including 6.19.*not affected · semver
    • 7.0 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.10-16.19.10-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.35.1.160000.2.166.12.0-160000.35.1.160000.2.16
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.35.16.12.0-160000.35.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Enterprise High Availability Extension 16.0kernel-defaultbefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Enterprise Server 16.0kernel-azurebefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Enterprise Server 16.0kernel-docsbefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Enterprise Server 16.0kernel-kvmsmallbefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Enterprise Server 16.0kernel-obs-qabefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Enterprise Server 16.0kernel-zfcpdumpbefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.35.16.12.0-160000.35.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.35.1.160000.2.166.12.0-160000.35.1.160000.2.16
SUSE:Linux Micro 6.2kernel-rtbefore 6.12.0-160000.35.16.12.0-160000.35.1

+3

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-2026-31399Apr 3, 2026 · nvdimm/bus: Fix potential use after free in asynchronous initialization
    31Monitor
  • ← EarlierCVE-2026-31400Apr 3, 2026 · sunrpc: fix cache_request leak in cache_release
    22Monitor
  • Later →CVE-2026-31402Apr 3, 2026 · nfsd: fix heap overflow in NFSv4.0 LOCK replay cache
    39Monitor

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 Linux2b658c1c442ec1cd9eec5ead98d68662c40fe645Vendor (CNA)
Linux Linux73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1Vendor (CNA)
Linux Linuxd6efaa50af62fb0790dd1fd4e7e5506b46312510Vendor (CNA)
Linux Linuxeb57dae20fdf6f3069cdc07821fa3bb46de381d7Vendor (CNA)
debian:linux6.12.85-1 · Debian:13Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.35.1.160000.2.16 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.35.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:kernel-64kb6.12.0-160000.35.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-azure6.12.0-160000.35.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-default6.12.0-160000.35.1 · SUSE:Linux Enterprise High Availability Extension 16.0Package registry (OSV)
suse:kernel-default-base6.12.0-160000.35.1.160000.2.16 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-docs6.12.0-160000.35.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-kvmsmall6.12.0-160000.35.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.35.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-obs-qa6.12.0-160000.35.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-rt6.12.0-160000.35.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-source6.12.0-160000.35.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-syms6.12.0-160000.35.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-zfcpdump6.12.0-160000.35.1 · SUSE:Linux Enterprise Server 16.0Package 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
high · data or configuration can be modified
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
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-secondary

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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records