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NVD / CVE Program· CNA Linux

CVE-2026-31522: HID: magicmouse: avoid memory leak in magicmouse_report_fixup()

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: 0.12% (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 136f605e246b4bfe7ac2259471d1ff814aed0084, 5.15.203, 5.17; azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 6.6.134.1-2; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 136f605e246b4bfe7ac2259471d1ff814aed0084, 5.15.203, 5.17; azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 6.6.134.1-2; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes 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: magicmouse: avoid memory leak in magicmouse_report_fixup() The magicmouse_report_fixup() function was returning a newly kmemdup()-allocated buffer, but never freeing it. The caller of report_fixup() does not take ownership of the returned pointer, but it *is* permitted to return a sub-portion of the input rdesc, whose lifetime is managed by the caller.

Published
Apr 22, 2026
Updated
Nov 11, 2026
EPSS
0.1% · 2th 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 · 0.1%

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-2026-31522

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

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

    • c394bd1bc8537e61593b6b6799e01495c7cf9008, 5.17affected
    • e6ad399596bd234be4722022146e33e15c7e424d and later · before 579c4c9857acdc8380fa99803f355f878bd766cbaffected · git
    • 0b91b4e4dae63cd43871fc2012370b86ee588f91 and later · before d84c21aabaab517b9aaf9bc1d785922cb9db2f31affected · git
    • 0b91b4e4dae63cd43871fc2012370b86ee588f91 and later · before 7edfe4346b052b708645d0acc0f186425766b785affected · git
    • 0b91b4e4dae63cd43871fc2012370b86ee588f91 and later · before 79e5dcc95d9abed6f8203cfd529f4ec71f0e505daffected · git
    • 0b91b4e4dae63cd43871fc2012370b86ee588f91 and later · before 136f605e246b4bfe7ac2259471d1ff814aed0084affected · git
    • 0b91b4e4dae63cd43871fc2012370b86ee588f91 and later · before fa95b0146358b49f9858139b67314591fd5871b0affected · git
    • 0b91b4e4dae63cd43871fc2012370b86ee588f91 and later · before 91e8c6e601bdc1ccdf886479b6513c01c7e51c2caffected · git
    • 5.15.17 and later · before 5.15.203affected · semver
    • 5.16.3 and later · before 5.17affected · semver
Affected versions · NVD (8)

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

  • linux linux kernel5.15.17 and later · before 5.15.203
  • linux linux kernel5.16.3 and later · before 5.17
  • linux linux kernel5.17 and later · before 6.1.168
  • linux linux kernel6.2 and later · before 6.6.131
  • linux linux kernel6.7 and later · before 6.12.80
  • linux linux kernel6.13 and later · before 6.18.21
  • linux linux kernel6.19 and later · before 6.19.11
  • linux linux kernel7.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.11-16.19.11-1

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-2026-31520Apr 22, 2026 · HID: apple: avoid memory leak in apple_report_fixup()
    22Monitor
  • ← EarlierCVE-2026-31521Apr 22, 2026 · module: Fix kernel panic when a symbol st_shndx is out of bounds
    22Monitor
  • Later →CVE-2026-31523Apr 22, 2026 · nvme-pci: ensure we're polling a polled queue
    18Monitor

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 Linux136f605e246b4bfe7ac2259471d1ff814aed0084Vendor (CNA)
Linux Linux5.15.203Vendor (CNA)
Linux Linux5.17Vendor (CNA)
Linux Linux579c4c9857acdc8380fa99803f355f878bd766cbVendor (CNA)
Linux Linux79e5dcc95d9abed6f8203cfd529f4ec71f0e505dVendor (CNA)
Linux Linux7edfe4346b052b708645d0acc0f186425766b785Vendor (CNA)
Linux Linux91e8c6e601bdc1ccdf886479b6513c01c7e51c2cVendor (CNA)
Linux Linuxd84c21aabaab517b9aaf9bc1d785922cb9db2f31Vendor (CNA)
Linux Linuxfa95b0146358b49f9858139b67314591fd5871b0Vendor (CNA)
azl3 kernel 6.6.130.1-3 on Azure Linux 3.06.6.134.1-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0Release NotesMicrosoft (MSRC)
debian:linux6.1.170-1 · 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.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · 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-401 · Missing Release of Memory after Effective Lifetime

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.

References

Show all references (6 more)

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

All records