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NVD / CVE Program· CNA Linux

CVE-2022-50099: video: fbdev: arkfb: Check the size of screen before memset_io()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.26% (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 0701df594bc1d7ae55fed407fb65dd90a93f8a9c, 09e733d6ac948e6fda4b16252e44ea46f98fc8b4, 2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75.

Low priority for now. Upgrade to Linux Linux 0701df594bc1d7ae55fed407fb65dd90a93f8a9c, 09e733d6ac948e6fda4b16252e44ea46f98fc8b4, 2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75 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: arkfb: Check the size of screen before memset_io() In the function arkfb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' may larger than 'info->screen_size', which may cause the following bug: [ 659.399066] BUG: unable to handle page fault for address: ffffc90003000000 [ 659.399077] #PF: supervisor write access in kernel mode [ 659.399079] #PF: error_code(0x0002) - not-present page [ 659.399094] RIP: 0010:memset_orig+0x33/0xb0 [ 659.399116] Call Trace: [ 659.399122] arkfb_set_par+0x143f/0x24c0 [ 659.399130] fb_set_var+0x604/0xeb0 [ 659.399161] do_fb_ioctl+0x234/0x670 [ 659.399189] fb_ioctl+0xdd/0x130 Fix the this by checking the value of 'screen_size' before memset_io().

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Aug 5, 2026
EPSS
0.2% · 17th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

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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 kernel2.6.22 and later · before 4.14.291
  • linux linux kernel4.15 and later · before 4.19.256
  • linux linux kernel4.20 and later · before 5.4.211
  • linux linux kernel5.5 and later · before 5.10.137
  • linux linux kernel5.11 and later · before 5.15.61
  • linux linux kernel5.16 and later · before 5.18.18
  • linux linux kernel5.19 and later · before 5.19.2

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

    • 2.6.22affected
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 4a20c5510aa2c031a096a58deb356e91609781c9affected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 352305ea50d682b8e081d826da53caf9e744d7d0affected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 53198b81930e567ad6b879812d88052a1e8ac79eaffected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 09e733d6ac948e6fda4b16252e44ea46f98fc8b4affected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 0701df594bc1d7ae55fed407fb65dd90a93f8a9caffected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 8bcb1a06e3091716b7cbebe0e91d1de9895068cdaffected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75affected · git
    • 681e14730c73cc2c71af282c001de6bc71c22f00 and later · before 96b550971c65d54d64728d8ba973487878a06454affected · git
    • before 2.6.22not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.2-16.0.2-1

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-2022-50096Jun 18, 2025 · x86/kprobes: Update kcb status flag after singlestepping
    22Monitor
  • ← EarlierCVE-2022-50097Jun 18, 2025 · video: fbdev: s3fb: Check the size of screen before memset_io()
    31Monitor
  • Later →CVE-2022-50100Jun 18, 2025 · sched/core: Do not requeue task on CPU excluded from cpus_mask
    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 Linux0701df594bc1d7ae55fed407fb65dd90a93f8a9cVendor (CNA)
Linux Linux09e733d6ac948e6fda4b16252e44ea46f98fc8b4Vendor (CNA)
Linux Linux2ce61c39c2a0b8ec82f48e0f7136f0dac105ae75Vendor (CNA)
Linux Linux352305ea50d682b8e081d826da53caf9e744d7d0Vendor (CNA)
Linux Linux4a20c5510aa2c031a096a58deb356e91609781c9Vendor (CNA)
Linux Linux53198b81930e567ad6b879812d88052a1e8ac79eVendor (CNA)
Linux Linux8bcb1a06e3091716b7cbebe0e91d1de9895068cdVendor (CNA)
Linux Linux96b550971c65d54d64728d8ba973487878a06454Vendor (CNA)
debian:linux6.0.2-1 · 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
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

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