Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2022-50010: video: fbdev: i740fb: Check the argument of i740_calc_vclk()

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: 0.25% (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 2b7f559152a33c55f51b569b22efbe5e24886798, 40bf722f8064f50200b8c4f8946cd625b441dda9, 4b20c61365140d432dee7da7aa294215e7b900d9.

Low priority for now. Upgrade to Linux Linux 2b7f559152a33c55f51b569b22efbe5e24886798, 40bf722f8064f50200b8c4f8946cd625b441dda9, 4b20c61365140d432dee7da7aa294215e7b900d9 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: i740fb: Check the argument of i740_calc_vclk() Since the user can control the arguments of the ioctl() from the user space, under special arguments that may result in a divide-by-zero bug. If the user provides an improper 'pixclock' value that makes the argumet of i740_calc_vclk() less than 'I740_RFREQ_FIX', it will cause a divide-by-zero bug in: drivers/video/fbdev/i740fb.c:353 p_best = min(15, ilog2(I740_MAX_VCO_FREQ / (freq / I740_RFREQ_FIX))); The following log can reveal it: divide error: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:i740_calc_vclk drivers/video/fbdev/i740fb.c:353 [inline] RIP: 0010:i740fb_decode_var drivers/video/fbdev/i740fb.c:646 [inline] RIP: 0010:i740fb_set_par+0x163f/0x3b70 drivers/video/fbdev/i740fb.c:742 Call Trace: fb_set_var+0x604/0xeb0 drivers/video/fbdev/core/fbmem.c:1034 do_fb_ioctl+0x234/0x670 drivers/video/fbdev/core/fbmem.c:1110 fb_ioctl+0xdd/0x130 drivers/video/fbdev/core/fbmem.c:1189 Fix this by checking the argument of i740_calc_vclk() first.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 16th percentile

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-2022-50010

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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 kernelbefore 4.9.326
  • linux linux kernel4.10 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 5.10.138
  • linux linux kernel5.11 and later · before 5.15.63
  • linux linux kernel5.16 and later · before 5.19.4

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

    • 3.4affected
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before 59cefb583c984c0da8cf21a4c57d26d5a20dff5caffected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before 656689cb03ada4650016c153346939a1c334b1aeaffected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before d2d375eb68b4b8de6ea7460483a26fa9de56b443affected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before 2b7f559152a33c55f51b569b22efbe5e24886798affected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before 4b20c61365140d432dee7da7aa294215e7b900d9affected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before e740e787f06671455b59d1e498c9945f7b4e7b3baffected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before f350812e2d15278f1d867eeb997407782234fb3caffected · git
    • 5350c65f4f15bbc111ffa629130d3f32cdd4ccf6 and later · before 40bf722f8064f50200b8c4f8946cd625b441dda9affected · git
    • before 3.4not 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-2022-50007Jun 18, 2025 · xfrm: fix refcount leak in __xfrm_policy_check()
    22Monitor
  • ← EarlierCVE-2022-50009Jun 18, 2025 · f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data
    22Monitor
  • Later →CVE-2022-50011Jun 18, 2025 · venus: pm_helpers: Fix warning in OPP during probe
    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 Linux2b7f559152a33c55f51b569b22efbe5e24886798Vendor (CNA)
Linux Linux40bf722f8064f50200b8c4f8946cd625b441dda9Vendor (CNA)
Linux Linux4b20c61365140d432dee7da7aa294215e7b900d9Vendor (CNA)
Linux Linux59cefb583c984c0da8cf21a4c57d26d5a20dff5cVendor (CNA)
Linux Linux656689cb03ada4650016c153346939a1c334b1aeVendor (CNA)
Linux Linuxd2d375eb68b4b8de6ea7460483a26fa9de56b443Vendor (CNA)
Linux Linuxe740e787f06671455b59d1e498c9945f7b4e7b3bVendor (CNA)
Linux Linuxf350812e2d15278f1d867eeb997407782234fb3cVendor (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.

  • CVE-2024-26945413 days apartcrypto: iaa - Fix nr_cpus < nr_iaa case
    33Monitor
  • CVE-2022-499780 days apartfbdev: fb_pm2fb: Avoid potential divide by zero error
    22Monitor
  • CVE-2022-501020 days apartvideo: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock()
    22Monitor
  • CVE-2022-501780 days apartwifi: rtw89: 8852a: rfk: fix div 0 exception
    22Monitor
  • CVE-2025-3812615 days apartnet: stmmac: make sure that ptp_rate is not 0 before configuring timestamping
    22Monitor
  • CVE-2025-3820516 days apartdrm/amd/display: Avoid divide by zero by initializing dummy pitch to 1
    22Monitor

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
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)

CWE-369 · Divide By Zero

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.

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