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NVD / CVE Program· CNA Linux

CVE-2022-49421: video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup

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: 0.29% (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 2e2e2c71b2642289438392edbf5d08cdbc0b138b, 38d245cebf545338a6bc1c7762023de3fbecd7b7, 51eb1bb6baeb478538dd4ec6459fd68c44a855b1.

Low priority for now. Upgrade to Linux Linux 2e2e2c71b2642289438392edbf5d08cdbc0b138b, 38d245cebf545338a6bc1c7762023de3fbecd7b7, 51eb1bb6baeb478538dd4ec6459fd68c44a855b1 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: video: fbdev: clcdfb: Fix refcount leak in clcdfb_of_vram_setup of_parse_phandle() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak.

Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 21th percentile
CWE
—

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%

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-2022-49421

When you'll hear from us

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  • 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

    • 3.17affected
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before 6c92711db7c90f78e0b67ac2a8944d0fe7e12d83affected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before 2e2e2c71b2642289438392edbf5d08cdbc0b138baffected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before 51eb1bb6baeb478538dd4ec6459fd68c44a855b1affected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before 8db59df7f5826e104db82cfddbf22a33a151193eaffected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before c1c4405222b6fc98c16e8c2aa679c14e41d81465affected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before f2dfb4ab887d67be7d0892ba041d3c8d738d3356affected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before bbb2a24e863b6a10129546a0a4ceea2f07deec39affected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before 38d245cebf545338a6bc1c7762023de3fbecd7b7affected · git
    • d10715be03bd8bad59ddc50236cb140c3bd73c7b and later · before b23789a59fa6f00e98a319291819f91fbba0deb8affected · git
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 kernel3.17 and later · before 4.9.318
  • linux linux kernel4.10 and later · before 4.14.283
  • linux linux kernel4.15 and later · before 4.19.247
  • linux linux kernel4.20 and later · before 5.4.198
  • linux linux kernel5.5 and later · before 5.10.121
  • linux linux kernel5.11 and later · before 5.15.46
  • linux linux kernel5.16 and later · before 5.17.14
  • linux linux kernel5.18 and later · before 5.18.3

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.5-15.18.5-1

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-2022-49418Feb 26, 2025 · NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
    22Monitor
  • ← EarlierCVE-2022-49419Feb 26, 2025 · video: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup
    31Monitor
  • Later →CVE-2022-49423Feb 26, 2025 · rtla: Avoid record NULL pointer dereference
    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 Linux2e2e2c71b2642289438392edbf5d08cdbc0b138bVendor (CNA)
Linux Linux38d245cebf545338a6bc1c7762023de3fbecd7b7Vendor (CNA)
Linux Linux51eb1bb6baeb478538dd4ec6459fd68c44a855b1Vendor (CNA)
Linux Linux6c92711db7c90f78e0b67ac2a8944d0fe7e12d83Vendor (CNA)
Linux Linux8db59df7f5826e104db82cfddbf22a33a151193eVendor (CNA)
Linux Linuxb23789a59fa6f00e98a319291819f91fbba0deb8Vendor (CNA)
Linux Linuxbbb2a24e863b6a10129546a0a4ceea2f07deec39Vendor (CNA)
Linux Linuxc1c4405222b6fc98c16e8c2aa679c14e41d81465Vendor (CNA)
Linux Linuxf2dfb4ab887d67be7d0892ba041d3c8d738d3356Vendor (CNA)
debian:linux5.18.5-1 · 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)

—

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 (8 more)

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

All records