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NVD / CVE Program· CNA Linux

CVE-2022-50317: drm/bridge: megachips: Fix a null pointer dereference bug

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: 0.16% (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 1daf69228e310938177119c4eadcd30fc75c81e0, 1ff673333d46d2c1b053ebd0c1c7c7c79e36943e, 21764467ab396d9f08921e0a5ffa1214244e1ad9.

Low priority for now. Upgrade to Linux Linux 1daf69228e310938177119c4eadcd30fc75c81e0, 1ff673333d46d2c1b053ebd0c1c7c7c79e36943e, 21764467ab396d9f08921e0a5ffa1214244e1ad9 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/bridge: megachips: Fix a null pointer dereference bug When removing the module we will get the following warning: [ 31.911505] i2c-core: driver [stdp2690-ge-b850v3-fw] unregistered [ 31.912484] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI [ 31.913338] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 31.915280] RIP: 0010:drm_bridge_remove+0x97/0x130 [ 31.921825] Call Trace: [ 31.922533] stdp4028_ge_b850v3_fw_remove+0x34/0x60 [megachips_stdpxxxx_ge_b850v3_fw] [ 31.923139] i2c_device_remove+0x181/0x1f0 The two bridges (stdp2690, stdp4028) do not probe at the same time, so the driver does not call ge_b850v3_resgiter() when probing, causing the driver to try to remove the object that has not been initialized. Fix this by checking whether both the bridges are probed.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 15, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th 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.

Follow CVE-2022-50317

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 kernel4.14.263 and later · before 4.14.296
  • linux linux kernel4.19.226 and later · before 4.19.262
  • linux linux kernel5.4.174 and later · before 5.4.220
  • linux linux kernel5.10.94 and later · before 5.10.150
  • linux linux kernel5.15.17 and later · before 5.15.75
  • linux linux kernel5.16.3 and later · before 5.19.17
  • linux linux kernel6.0 and later · before 6.0.3

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

    • e449461989f0674f188d30494ffd3f5ba74c1a05, 5.17affected
    • 7649972d97fb98578fbc4a351416cf72895e7c4d and later · before aaa512ad1e59f2edf8a9e4f2b167a44b24670679affected · git
    • 16e3827904932eccfba0915f0c93b519de3536ac and later · before 5bc20bafcd87ba0858ab772cefc7047cb51bc249affected · git
    • 50ad94f8654a53ec9ca3604a7a23cbaf166e0119 and later · before 1daf69228e310938177119c4eadcd30fc75c81e0affected · git
    • b8d10f601f226f055df8b5368d7ea7f369136cd5 and later · before 877e92e9b1bdeb580b31a46061005936be902cd4affected · git
    • 405856460d3e7aefb7c1aef047ec88fc4ef2e2a5 and later · before 4610e7a4111fa3f3ce27c09d6d94008c55f1cd31affected · git
    • 11632d4aa2b3f126790e81a4415d6c23103cf8bb and later · before 21764467ab396d9f08921e0a5ffa1214244e1ad9affected · git
    • 11632d4aa2b3f126790e81a4415d6c23103cf8bb and later · before 7371fad5cfe6eada6bb5523c895fd6074b15c2b9affected · git
    • 11632d4aa2b3f126790e81a4415d6c23103cf8bb and later · before 1ff673333d46d2c1b053ebd0c1c7c7c79e36943eaffected · git
    • 4.14.263 and later · before 4.14.296affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.3-16.0.3-1

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-2022-50314Sep 15, 2025 · nbd: Fix hung when signal interrupts nbd_start_device_ioctl()
    22Monitor
  • ← EarlierCVE-2022-50316Sep 15, 2025 · orangefs: Fix kmemleak in orangefs_sysfs_init()
    22Monitor
  • Later →CVE-2022-50318Sep 15, 2025 · perf/x86/intel/uncore: Fix reference count leak in hswep_has_limit_sbox()
    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 Linux1daf69228e310938177119c4eadcd30fc75c81e0Vendor (CNA)
Linux Linux1ff673333d46d2c1b053ebd0c1c7c7c79e36943eVendor (CNA)
Linux Linux21764467ab396d9f08921e0a5ffa1214244e1ad9Vendor (CNA)
Linux Linux4.14.296Vendor (CNA)
Linux Linux4.19.262Vendor (CNA)
Linux Linux4610e7a4111fa3f3ce27c09d6d94008c55f1cd31Vendor (CNA)
Linux Linux5.10.150Vendor (CNA)
Linux Linux5.15.75Vendor (CNA)
Linux Linux5.17Vendor (CNA)
Linux Linux5.4.220Vendor (CNA)
Linux Linux5bc20bafcd87ba0858ab772cefc7047cb51bc249Vendor (CNA)
Linux Linux7371fad5cfe6eada6bb5523c895fd6074b15c2b9Vendor (CNA)
Linux Linux877e92e9b1bdeb580b31a46061005936be902cd4Vendor (CNA)
Linux Linuxaaa512ad1e59f2edf8a9e4f2b167a44b24670679Vendor (CNA)
debian:linux6.0.3-1 · 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
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-476 · NULL Pointer Dereference

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