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NVD / CVE Program· CNA Linux

CVE-2021-46906: HID: usbhid: fix info leak in hid_submit_ctrl

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: 0.24% (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 0e280502be1b003c3483ae03fc60dea554fcfa82, 21883bff0fd854e07429a773ff18f1e9658f50e8, 41b1e71a2c57366b08dcca1a28b0d45ca69429ce.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0e280502be1b003c3483ae03fc60dea554fcfa82, 21883bff0fd854e07429a773ff18f1e9658f50e8, 41b1e71a2c57366b08dcca1a28b0d45ca69429ce 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: usbhid: fix info leak in hid_submit_ctrl In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl().

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 15th 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 · 0.2%

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

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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 kernelbefore 4.4.274
  • linux linux kernel4.5.0 and later · before 4.9.274
  • linux linux kernel4.10.0 and later · before 4.14.238
  • linux linux kernel4.15.0 and later · before 4.19.196
  • linux linux kernel4.20.0 and later · before 5.4.127
  • linux linux kernel5.5.0 and later · before 5.10.45
  • linux linux kernel5.11.0 and later · before 5.12.12

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c5d3c142f2d57d40c55e65d5622d319125a45366affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 41b1e71a2c57366b08dcca1a28b0d45ca69429ceaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8c064eece9a51856f3f275104520c7e3017fc5c0affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0e280502be1b003c3483ae03fc60dea554fcfa82affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b1e3596416d74ce95cc0b7b38472329a3818f8a9affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 21883bff0fd854e07429a773ff18f1e9658f50e8affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6be388f4a35d2ce5ef7dbf635a8964a5da7f799faffected · git
    • before 2.6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.14.6-15.14.6-1
SUSE:Linux Enterprise High Availability Extension 12 SP5kernel-defaultbefore 4.12.14-122.201.14.12.14-122.201.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-default-basebefore 5.3.18-150200.24.183.1.150200.9.93.25.3.18-150200.24.183.1.150200.9.93.2
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-docsbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-obs-buildbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-preemptbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-sourcebefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-symsbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-64kbbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-default-basebefore 5.3.18-150300.59.153.2.150300.18.90.25.3.18-150300.59.153.2.150300.18.90.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-docsbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-obs-buildbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-preemptbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-sourcebefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-symsbefore 5.3.18-150300.59.153.15.3.18-150300.59.153.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_54before 1-8.7.11-8.7.1
SUSE:Linux Enterprise Live Patching 15 SP2kernel-defaultbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise Live Patching 15 SP2kernel-livepatch-SLE15-SP2_Update_46before 1-150200.5.3.21-150200.5.3.2
SUSE:Linux Enterprise Live Patching 15 SP3kernel-defaultbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_42before 1-150300.7.3.21-150300.7.3.2
SUSE:Linux Enterprise Micro 5.1kernel-rtbefore 5.3.18-150300.161.15.3.18-150300.161.1
SUSE:Linux Enterprise Micro 5.1kernel-source-rtbefore 5.3.18-150300.161.15.3.18-150300.161.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rtbefore 4.12.14-10.171.14.12.14-10.171.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rt_debugbefore 4.12.14-10.171.14.12.14-10.171.1

+10

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-2019-25162Feb 26, 2024 · i2c: Fix a potential use after free
    31Monitor
  • ← EarlierCVE-2020-36775Feb 26, 2024 · f2fs: fix to avoid potential deadlock
    22Monitor
  • Later →CVE-2023-52474Feb 26, 2024 · IB/hfi1: Fix bugs with non-PAGE_SIZE-end multi-iovec user SDMA requests
    31Monitor

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 Linux0e280502be1b003c3483ae03fc60dea554fcfa82Vendor (CNA)
Linux Linux21883bff0fd854e07429a773ff18f1e9658f50e8Vendor (CNA)
Linux Linux41b1e71a2c57366b08dcca1a28b0d45ca69429ceVendor (CNA)
Linux Linux6be388f4a35d2ce5ef7dbf635a8964a5da7f799fVendor (CNA)
Linux Linux7f5a4b24cdbd7372770a02f23e347d7d9a9ac8f1Vendor (CNA)
Linux Linux8c064eece9a51856f3f275104520c7e3017fc5c0Vendor (CNA)
Linux Linuxb1e3596416d74ce95cc0b7b38472329a3818f8a9Vendor (CNA)
Linux Linuxc5d3c142f2d57d40c55e65d5622d319125a45366Vendor (CNA)
debian:linux5.14.6-1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-default5.3.18-150300.59.153.2 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-default-base5.3.18-150300.59.153.2.150300.18.90.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-docs5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_421-150300.7.3.2 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-obs-build5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-preempt5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-rt5.3.18-150300.161.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-source5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-source-rt5.3.18-150300.161.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-syms5.3.18-150300.59.153.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-zfcpdump5.3.18-150300.59.153.2 · SUSE:Linux Enterprise Server 15 SP3-LTSSPackage 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.

  • CVE-2025-22069415 days apartriscv: fgraph: Fix stack layout to match __arch_ftrace_regs argument of ftrace_return_to_handler
    31Monitor
  • CVE-2024-3603294 days apartBluetooth: qca: fix info leak when fetching fw build id
    28Monitor
  • CVE-2024-3603394 days apartBluetooth: qca: fix info leak when fetching board id
    28Monitor
  • CVE-2022-48757115 days apartnet: fix information leakage in /proc/net/ptype
    28Monitor
  • CVE-2024-39499137 days apartvmci: prevent speculation leaks by sanitizing event in event_deliver()
    28Monitor
  • CVE-2024-43881176 days apartwifi: ath12k: change DMA direction while mapping reinjected packets
    28Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-668 · Exposure of Resource to Wrong Sphere

CVSS vector

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

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 (7 more)

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

All records