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CVE-2022-50101· NVD / CVE Program· CNA Linux

video: fbdev: vt8623fb: 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 4a3cef1eaced13ba9b55381d46bfad937a3dac2c, 52ad9bfeb8a0e62de30de6d39e8a49a72dd78150, 73280a184aa2e1a625ce54ce761042955cc79cd0.

Low priority for now. Upgrade to Linux Linux 4a3cef1eaced13ba9b55381d46bfad937a3dac2c, 52ad9bfeb8a0e62de30de6d39e8a49a72dd78150, 73280a184aa2e1a625ce54ce761042955cc79cd0 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: vt8623fb: Check the size of screen before memset_io() In the function vt8623fb_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: [ 583.339036] BUG: unable to handle page fault for address: ffffc90005000000 [ 583.339049] #PF: supervisor write access in kernel mode [ 583.339052] #PF: error_code(0x0002) - not-present page [ 583.339074] RIP: 0010:memset_orig+0x33/0xb0 [ 583.339110] Call Trace: [ 583.339118] vt8623fb_set_par+0x11cd/0x21e0 [ 583.339146] fb_set_var+0x604/0xeb0 [ 583.339181] do_fb_ioctl+0x234/0x670 [ 583.339209] 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
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before 73280a184aa2e1a625ce54ce761042955cc79cd0affected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before 52ad9bfeb8a0e62de30de6d39e8a49a72dd78150affected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before d71528ccdc7ae8d7500d414091d27805c51407a2affected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before bd8269e57621e5b38cc0b4bd2fa02e85c9f2a441affected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before 4a3cef1eaced13ba9b55381d46bfad937a3dac2caffected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before b17caec5127bba6f90af92bcc85871df54548ac0affected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before c7a3f41e4b133d4dd25bc996b69039b19a34d69daffected · git
    • 558b7bd86c32978648cda5deb5c758d77ef0c165 and later · before ec0754c60217248fa77cc9005d66b2b55200ac06affected · 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-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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-50099Jun 18, 2025 · video: fbdev: arkfb: Check the size of screen before memset_io()
    31Monitor
  • ← EarlierCVE-2022-50100Jun 18, 2025 · sched/core: Do not requeue task on CPU excluded from cpus_mask
    22Monitor
  • Later →CVE-2022-50102Jun 18, 2025 · video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock()
    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 Linux4a3cef1eaced13ba9b55381d46bfad937a3dac2cVendor (CNA)
Linux Linux52ad9bfeb8a0e62de30de6d39e8a49a72dd78150Vendor (CNA)
Linux Linux73280a184aa2e1a625ce54ce761042955cc79cd0Vendor (CNA)
Linux Linuxb17caec5127bba6f90af92bcc85871df54548ac0Vendor (CNA)
Linux Linuxbd8269e57621e5b38cc0b4bd2fa02e85c9f2a441Vendor (CNA)
Linux Linuxc7a3f41e4b133d4dd25bc996b69039b19a34d69dVendor (CNA)
Linux Linuxd71528ccdc7ae8d7500d414091d27805c51407a2Vendor (CNA)
Linux Linuxec0754c60217248fa77cc9005d66b2b55200ac06Vendor (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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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