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NVD / CVE Program· CNA Linux

CVE-2021-46932: Input: appletouch - initialize work before device registration

MediumCVSS 5.5 · v3.1—No exploit Fix available

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: 0.22% (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 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f, 975774ea7528b489930b76a77ffc4d5379b95ff2, 9f329d0d6c91142cf0ad08d23c72dd195db2633c.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f, 975774ea7528b489930b76a77ffc4d5379b95ff2, 9f329d0d6c91142cf0ad08d23c72dd195db2633c 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: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device

Published
Feb 27, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 13th 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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-46932

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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

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

    • 2.6.23affected
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4affected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before d1962f263a176f493400b8f91bfbf2bfedce951eaffected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99faffected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before a02e1404e27855089d2b0a0acc4652c2ce65fe46affected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before 975774ea7528b489930b76a77ffc4d5379b95ff2affected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before 9f329d0d6c91142cf0ad08d23c72dd195db2633caffected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before e79ff8c68acb1eddf709d3ac84716868f2a91012affected · git
    • 5a6eb676d3bc4d7a6feab200a92437b62ad298da and later · before 9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0affected · git
    • before 2.6.23not affected · semver
Affected versions · NVD (7)

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

  • linux linux kernel2.6.23 and later · before 4.4.298
  • linux linux kernel4.5.0 and later · before 4.9.296
  • linux linux kernel4.10.0 and later · before 4.14.261
  • linux linux kernel4.15.0 and later · before 4.19.224
  • linux linux kernel4.20.0 and later · before 5.4.170
  • linux linux kernel5.5.0 and later · before 5.10.90
  • linux linux kernel5.11.0 and later · before 5.15.13

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.15.15-15.15.15-1
openSUSE:Leap 15.5dtb-aarch64before 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-64kbbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-azurebefore 5.14.21-150500.33.37.15.14.21-150500.33.37.1
openSUSE:Leap 15.5kernel-debugbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-defaultbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-default-basebefore 5.14.21-150500.55.52.1.150500.6.23.15.14.21-150500.55.52.1.150500.6.23.1
openSUSE:Leap 15.5kernel-docsbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-kvmsmallbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-obs-buildbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-obs-qabefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-rtbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-rt_debugbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-sourcebefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-source-azurebefore 5.14.21-150500.33.37.15.14.21-150500.33.37.1
openSUSE:Leap 15.5kernel-source-rtbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-symsbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap 15.5kernel-syms-azurebefore 5.14.21-150500.33.37.15.14.21-150500.33.37.1
openSUSE:Leap 15.5kernel-syms-rtbefore 5.14.21-150500.13.38.15.14.21-150500.13.38.1
openSUSE:Leap 15.5kernel-zfcpdumpbefore 5.14.21-150500.55.52.15.14.21-150500.55.52.1
openSUSE:Leap Micro 5.3kernel-defaultbefore 5.14.21-150400.24.111.25.14.21-150400.24.111.2
openSUSE:Leap Micro 5.3kernel-default-basebefore 5.14.21-150400.24.111.2.150400.24.52.15.14.21-150400.24.111.2.150400.24.52.1
openSUSE:Leap Micro 5.3kernel-rtbefore 5.14.21-150400.15.71.15.14.21-150400.15.71.1
SUSE:Linux Enterprise High Availability Extension 12 SP5kernel-defaultbefore 4.12.14-122.201.14.12.14-122.201.1

+67

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-2021-46930Feb 27, 2024 · usb: mtu3: fix list_head check warning
    22Monitor
  • ← EarlierCVE-2021-46931Feb 27, 2024 · net/mlx5e: Wrap the tx reporter dump callback to extract the sq
    22Monitor
  • Later →CVE-2021-46933Feb 27, 2024 · usb: gadget: f_fs: Clear ffs_eventfd in ffs_data_clear.
    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 Linux292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99fVendor (CNA)
Linux Linux975774ea7528b489930b76a77ffc4d5379b95ff2Vendor (CNA)
Linux Linux9f329d0d6c91142cf0ad08d23c72dd195db2633cVendor (CNA)
Linux Linux9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0Vendor (CNA)
Linux Linuxa02e1404e27855089d2b0a0acc4652c2ce65fe46Vendor (CNA)
Linux Linuxd1962f263a176f493400b8f91bfbf2bfedce951eVendor (CNA)
Linux Linuxd2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4Vendor (CNA)
Linux Linuxe79ff8c68acb1eddf709d3ac84716868f2a91012Vendor (CNA)
debian:linux5.15.15-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch645.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-64kb5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-debug5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-default-base5.14.21-150500.55.52.1.150500.6.23.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-docs5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-kvmsmall5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-obs-build5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-obs-qa5.14.21-150500.55.52.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-source-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:kernel-syms-azure5.14.21-150500.33.37.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:kernel-64kb5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP5Package registry (OSV)
suse:kernel-64kb5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-azure5.14.21-150500.33.37.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5Package registry (OSV)
suse:kernel-default5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default5.3.18-150300.59.153.2 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.52.1.150500.6.23.1 · SUSE:Linux Enterprise Micro 5.5Package 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-docs5.14.21-150500.55.52.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP5Package registry (OSV)
suse:kernel-docs5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)

+9

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.

Variant candidates

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

  • CVE-2023-524525 days apartbpf: Fix accesses to uninit stack slots
    31Monitor
  • CVE-2021-4719443 days apartcfg80211: call cfg80211_stop_ap when switch from P2P_GO type
    31Monitor
  • CVE-2024-38558113 days apartnet: openvswitch: fix overwriting ct original tuple for ICMPv6
    22Monitor
  • CVE-2024-39301119 days apartnet/9p: fix uninit-value in p9_client_rpc()
    22Monitor
  • CVE-2024-39485129 days apartmedia: v4l: async: Properly re-initialise notifier entry in unregister
    22Monitor
  • CVE-2024-42078153 days apartnfsd: initialise nfsd_info.mutex early.
    22Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

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)

CWE-665 · Improper Initialization

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.

ATT&CK techniques

—

References

Show all references (7 more)

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

All records