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NVD / CVE Program· CNA Linux

CVE-2022-50097: video: fbdev: s3fb: 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: 0.20% (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 3c35a0dc2b4e7acf24c796043b64fa3eee799239, 52461d387cc8c8f8dc40320caa2e9e101f73e7ba, 574912261528589012b61f82d368256247c3a5a8.

Low priority for now. Upgrade to Linux Linux 3c35a0dc2b4e7acf24c796043b64fa3eee799239, 52461d387cc8c8f8dc40320caa2e9e101f73e7ba, 574912261528589012b61f82d368256247c3a5a8 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: s3fb: Check the size of screen before memset_io() In the function s3fb_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: [ 54.083733] BUG: unable to handle page fault for address: ffffc90003000000 [ 54.083742] #PF: supervisor write access in kernel mode [ 54.083744] #PF: error_code(0x0002) - not-present page [ 54.083760] RIP: 0010:memset_orig+0x33/0xb0 [ 54.083782] Call Trace: [ 54.083788] s3fb_set_par+0x1ec6/0x4040 [ 54.083806] fb_set_var+0x604/0xeb0 [ 54.083836] do_fb_ioctl+0x234/0x670 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% · 10th 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
7.1
0.7 point gap

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

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.

Follow CVE-2022-50097

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 kernel2.6.21 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

    • 2.6.21affected
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before 574912261528589012b61f82d368256247c3a5a8affected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before 3c35a0dc2b4e7acf24c796043b64fa3eee799239affected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before eacb50f1733660911827d7c3720f4c5425d0cddaaffected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before 5e0da18956d38e7106664dc1d06367b22f06edd3affected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before ce50d94afcb8690813c5522f24cd38737657db81affected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before 52461d387cc8c8f8dc40320caa2e9e101f73e7baaffected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before e2d7cacc6a2a1d77e7e20a492daf458a12cf19e0affected · git
    • a268422de8bf1b4c0cb97987b6c329c9f6a3da4b and later · before 6ba592fa014f21f35a8ee8da4ca7b95a018f13e8affected · git
    • before 2.6.21not 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-2022-50095Jun 18, 2025 · posix-cpu-timers: Cleanup CPU timers before freeing them during exec
    31Monitor
  • ← EarlierCVE-2022-50096Jun 18, 2025 · x86/kprobes: Update kcb status flag after singlestepping
    22Monitor
  • Later →CVE-2022-50099Jun 18, 2025 · video: fbdev: arkfb: Check the size of screen before memset_io()
    31Monitor

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 Linux3c35a0dc2b4e7acf24c796043b64fa3eee799239Vendor (CNA)
Linux Linux52461d387cc8c8f8dc40320caa2e9e101f73e7baVendor (CNA)
Linux Linux574912261528589012b61f82d368256247c3a5a8Vendor (CNA)
Linux Linux5e0da18956d38e7106664dc1d06367b22f06edd3Vendor (CNA)
Linux Linux6ba592fa014f21f35a8ee8da4ca7b95a018f13e8Vendor (CNA)
Linux Linuxce50d94afcb8690813c5522f24cd38737657db81Vendor (CNA)
Linux Linuxe2d7cacc6a2a1d77e7e20a492daf458a12cf19e0Vendor (CNA)
Linux Linuxeacb50f1733660911827d7c3720f4c5425d0cddaVendor (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