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NVD / CVE Program· CNA Linux

CVE-2022-50036: drm/sun4i: dsi: Prevent underflow when computing packet sizes

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: 0.19% (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 82a1356a933d8443139f8886f11b63c974a09a67, 98e28de472ef248352f04f87e29e634ebb0ec240, a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26.

Low priority for now. Upgrade to Linux Linux 82a1356a933d8443139f8886f11b63c974a09a67, 98e28de472ef248352f04f87e29e634ebb0ec240, a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26 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: drm/sun4i: dsi: Prevent underflow when computing packet sizes Currently, the packet overhead is subtracted using unsigned arithmetic. With a short sync pulse, this could underflow and wrap around to near the maximal u16 value. Fix this by using signed subtraction. The call to max() will correctly handle any negative numbers that are produced. Apply the same fix to the other timings, even though those subtractions are less likely to underflow.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jun 18, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 9th 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 · 0.1%

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 kernel4.18 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
  • linux linux kernel6.0

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

    • 4.18affected
    • 133add5b5ad42b7bb5fcd59d681aef6475d08600 and later · before a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26affected · git
    • 133add5b5ad42b7bb5fcd59d681aef6475d08600 and later · before 98e28de472ef248352f04f87e29e634ebb0ec240affected · git
    • 133add5b5ad42b7bb5fcd59d681aef6475d08600 and later · before fb837f5b83461624e525727a8f4add14b201147eaffected · git
    • 133add5b5ad42b7bb5fcd59d681aef6475d08600 and later · before 82a1356a933d8443139f8886f11b63c974a09a67affected · git
    • before 4.18not affected · semver
    • 5.10.138 and later · up to and including 5.10.*not affected · semver
    • 5.15.63 and later · up to and including 5.15.*not affected · semver
    • 5.19.4 and later · up to and including 5.19.*not affected · semver
    • 6.0 and laternot affected · original_commit_for_fix

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-2022-50034Jun 18, 2025 · usb: cdns3 fix use-after-free at workaround 2
    31Monitor
  • ← EarlierCVE-2022-50035Jun 18, 2025 · drm/amdgpu: Fix use-after-free on amdgpu_bo_list mutex
    31Monitor
  • Later →CVE-2022-50037Jun 18, 2025 · drm/i915/ttm: don't leak the ccs state
    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 Linux82a1356a933d8443139f8886f11b63c974a09a67Vendor (CNA)
Linux Linux98e28de472ef248352f04f87e29e634ebb0ec240Vendor (CNA)
Linux Linuxa1e7908f78f5a7f53f8cd83c7dcdfec974c95f26Vendor (CNA)
Linux Linuxfb837f5b83461624e525727a8f4add14b201147eVendor (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-2026-53176372 days apartIB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN
    39Monitor
  • CVE-2026-63940396 days apartKVM: SEV: Ignore Port I/O requests of length '0'
    37Monitor
  • CVE-2024-26828427 days apartcifs: fix underflow in parse_server_interfaces()
    37Monitor
  • CVE-2026-43187322 days apartxfs: delete attr leaf freemap entries when empty
    35Monitor
  • CVE-2026-53178372 days apartstaging: rtl8723bs: rtw_mlme: add bounds checks before ie_length subtraction
    32Monitor
  • CVE-2024-53061211 days apartmedia: s5p-jpeg: prevent buffer overflows
    31Monitor

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-191 · Integer Underflow (Wrap or Wraparound)

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✗ → ✓

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References

Show all references (3 more)

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

All records