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CVE-2022-50244· NVD / CVE Program· CNA Linux

cxl: fix possible null-ptr-deref in cxl_pci_init_afu|adapter()

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 02cd3032b154fa02fdf90e7467abaeed889330b2, 0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdec, 139abd4c626a6f7ce02789ed5f73aa2256e0542b.

Low priority for now. Upgrade to Linux Linux 02cd3032b154fa02fdf90e7467abaeed889330b2, 0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdec, 139abd4c626a6f7ce02789ed5f73aa2256e0542b 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: cxl: fix possible null-ptr-deref in cxl_pci_init_afu|adapter() If device_register() fails in cxl_pci_afu|adapter(), the device is not added, device_unregister() can not be called in the error path, otherwise it will cause a null-ptr-deref because of removing not added device. As comment of device_register() says, it should use put_device() to give up the reference in the error path. So split device_unregister() into device_del() and put_device(), then goes to put dev when register fails.

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

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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 kernel3.18 and later · before 4.9.337
  • linux linux kernel4.10 and later · before 4.14.303
  • linux linux kernel4.15 and later · before 4.19.270
  • linux linux kernel4.20 and later · before 5.4.229
  • linux linux kernel5.5 and later · before 5.10.163
  • linux linux kernel5.11 and later · before 5.15.86
  • linux linux kernel5.16 and later · before 6.0.16
  • linux linux kernel6.1 and later · before 6.1.2

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

    • 3.18affected
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 82e68432668ae75b4c814d160f6987ecb0681273affected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 82e5481428faf11c79b9c094dd24a1849bbf64acaffected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before c4b2e35df919d99bbbed033c2fa0b607f9f463b5affected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 361412dae1690d4b5df6f92fc943cdc773c95cbcaffected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdecaffected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 22511eefa61db26e12c97dd7ada3071dbdfcb004affected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 139abd4c626a6f7ce02789ed5f73aa2256e0542baffected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 2f5fd31b2f24b9b8a80ab566fd8c4e1e94cb4339affected · git
    • f204e0b8cedd7da1dfcfd05ed6b7692737e24029 and later · before 02cd3032b154fa02fdf90e7467abaeed889330b2affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1
SUSE:Linux Enterprise Live Patching 12 SP5kernel-defaultbefore 4.12.14-122.275.14.12.14-122.275.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_73before 1-8.3.11-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-sourcebefore 4.12.14-122.275.14.12.14-122.275.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-symsbefore 4.12.14-122.275.14.12.14-122.275.1

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-2022-50242Sep 15, 2025 · drivers: net: qlcnic: Fix potential memory leak in qlcnic_sriov_init()
    22Monitor
  • ← EarlierCVE-2022-50243Sep 15, 2025 · sctp: handle the error returned from sctp_auth_asoc_init_active_key
    31Monitor
  • Later →CVE-2022-50245Sep 15, 2025 · rapidio: fix possible UAF when kfifo_alloc() fails
    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 Linux02cd3032b154fa02fdf90e7467abaeed889330b2Vendor (CNA)
Linux Linux0f63c0ddc2ea20d783d29243f4dbe0f9e95dfdecVendor (CNA)
Linux Linux139abd4c626a6f7ce02789ed5f73aa2256e0542bVendor (CNA)
Linux Linux22511eefa61db26e12c97dd7ada3071dbdfcb004Vendor (CNA)
Linux Linux2f5fd31b2f24b9b8a80ab566fd8c4e1e94cb4339Vendor (CNA)
Linux Linux361412dae1690d4b5df6f92fc943cdc773c95cbcVendor (CNA)
Linux Linux82e5481428faf11c79b9c094dd24a1849bbf64acVendor (CNA)
Linux Linux82e68432668ae75b4c814d160f6987ecb0681273Vendor (CNA)
Linux Linuxc4b2e35df919d99bbbed033c2fa0b607f9f463b5Vendor (CNA)
debian:linux6.1.4-1 · Debian:12Package registry (OSV)
suse:kernel-default4.12.14-122.275.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kernel-source4.12.14-122.275.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kernel-syms4.12.14-122.275.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_731-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package 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 (8 more)

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

All records