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NVD / CVE Program· CNA Linux

CVE-2022-50522: mcb: mcb-parse: fix error handing in chameleon_parse_gdd()

Noroxi assessment

Priority: Monitor (action score 13/100)

  • 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: 0.16% (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 110dc34c9fa33d37f55b394b1199ea6c0ad1ee84, 43bfc7c2402a22d3b4eb08c040f274ba2b76461a, 4a9f1a8b3af287581ffb690d0e1593c681729ddb.

Low priority for now. Upgrade to Linux Linux 110dc34c9fa33d37f55b394b1199ea6c0ad1ee84, 43bfc7c2402a22d3b4eb08c040f274ba2b76461a, 4a9f1a8b3af287581ffb690d0e1593c681729ddb 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: mcb: mcb-parse: fix error handing in chameleon_parse_gdd() If mcb_device_register() returns error in chameleon_parse_gdd(), the refcount of bus and device name are leaked. Fix this by calling put_device() to give up the reference, so they can be released in mcb_release_dev() and kobject_cleanup().

LowCVSS 3.3 · v3.1—No exploit Fix available
Published
Oct 7, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th percentile
CWE
—

Report tools

JSON

Action score

13

Monitor

Low priority for now.

CVSS
13 / 40 · 3.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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-2022-50522

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 kernel3.15 and later · before 4.9.337
  • linux linux kernel4.10 and later · before 4.14.303
  • linux linux kernel4.15 and later · before 4.19.270
  • linux linux kernel4.20 and later · before 5.4.229
  • linux linux kernel5.5 and later · before 5.10.163
  • linux linux kernel5.11 and later · before 5.15.86
  • linux linux kernel5.16 and later · before 6.0.16
  • linux linux kernel6.1 and later · before 6.1.2

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

    • 3.15affected
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before 891f606ae0765bc9ca99f5276735be4d338f0255affected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before cf6e70c0ced50b52415ac0c88eba1fb09c500a5aaffected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before fd85ece416fd7edb945203e59d4cd94952f77e7caffected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before 110dc34c9fa33d37f55b394b1199ea6c0ad1ee84affected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before 7b289b791a59386dc23a00d3cf17a0db984b40d3affected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before 43bfc7c2402a22d3b4eb08c040f274ba2b76461aaffected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before b948baa29394ec5f4e6ec28486e7d06a76caee91affected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before 4a9f1a8b3af287581ffb690d0e1593c681729ddbaffected · git
    • 3764e82e5150d87b205c10cd78a9c9ab86fbfa51 and later · before 728ac3389296caf68638628c987aeae6c8851e2daffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1

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-2022-50520Oct 7, 2025 · drm/radeon: Fix PCI device refcount leak in radeon_atrm_get_bios()
    22Monitor
  • ← EarlierCVE-2022-50521Oct 7, 2025 · platform/x86: mxm-wmi: fix memleak in mxm_wmi_call_mx[ds|mx]()
    22Monitor
  • Later →CVE-2022-50523Oct 7, 2025 · clk: rockchip: Fix memory leak in rockchip_clk_register_pll()
    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 Linux110dc34c9fa33d37f55b394b1199ea6c0ad1ee84Vendor (CNA)
Linux Linux43bfc7c2402a22d3b4eb08c040f274ba2b76461aVendor (CNA)
Linux Linux4a9f1a8b3af287581ffb690d0e1593c681729ddbVendor (CNA)
Linux Linux728ac3389296caf68638628c987aeae6c8851e2dVendor (CNA)
Linux Linux7b289b791a59386dc23a00d3cf17a0db984b40d3Vendor (CNA)
Linux Linux891f606ae0765bc9ca99f5276735be4d338f0255Vendor (CNA)
Linux Linuxb948baa29394ec5f4e6ec28486e7d06a76caee91Vendor (CNA)
Linux Linuxcf6e70c0ced50b52415ac0c88eba1fb09c500a5aVendor (CNA)
Linux Linuxfd85ece416fd7edb945203e59d4cd94952f77e7cVendor (CNA)
debian:linux6.1.4-1 · 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.

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
low · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/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 (8 more)

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

All records