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NVD / CVE Program· CNA Linux

CVE-2022-50775: RDMA/hns: Fix refcount leak in hns_roce_mmap

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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).
  • Fixed version: Linux Linux 8abd2ff2256a2a99c11c7ecdcb5512429933620f, cf6a05c8494a8ae7fec8e5f1229b45ca5b4bcd30, fa87cf2e756efe809ee8683d4f282f4de962dab6.

Low priority for now. Upgrade to Linux Linux 8abd2ff2256a2a99c11c7ecdcb5512429933620f, cf6a05c8494a8ae7fec8e5f1229b45ca5b4bcd30, fa87cf2e756efe809ee8683d4f282f4de962dab6 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: RDMA/hns: Fix refcount leak in hns_roce_mmap rdma_user_mmap_entry_get_pgoff() takes the reference. Add missing rdma_user_mmap_entry_put() to release the reference. Acked-by Haoyue Xu <xuhaoyue1@hisilicon.com>

—No exploit Fix available
Published
Dec 24, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 17th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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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.

—

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

    • 5.17affected
    • 0045e0d3f42ed7d05434bb5bc16acfc793ea4891 and later · before fa87cf2e756efe809ee8683d4f282f4de962dab6affected · git
    • 0045e0d3f42ed7d05434bb5bc16acfc793ea4891 and later · before 8abd2ff2256a2a99c11c7ecdcb5512429933620faffected · git
    • 0045e0d3f42ed7d05434bb5bc16acfc793ea4891 and later · before cf6a05c8494a8ae7fec8e5f1229b45ca5b4bcd30affected · git
    • before 5.17not affected · semver
    • 6.1.16 and later · up to and including 6.1.*not affected · semver
    • 6.2.3 and later · up to and including 6.2.*not affected · semver
    • 6.3 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 6.1.20-16.1.20-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-50773Dec 24, 2025 · ALSA: mts64: fix possible null-ptr-defer in snd_mts64_interrupt
    0Monitor
  • ← EarlierCVE-2022-50774Dec 24, 2025 · crypto: qat - fix DMA transfer direction
    0Monitor
  • Later →CVE-2022-50776Dec 24, 2025 · clk: st: Fix memory leak in st_of_quadfs_setup()
    0Monitor

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 Linux8abd2ff2256a2a99c11c7ecdcb5512429933620fVendor (CNA)
Linux Linuxcf6a05c8494a8ae7fec8e5f1229b45ca5b4bcd30Vendor (CNA)
Linux Linuxfa87cf2e756efe809ee8683d4f282f4de962dab6Vendor (CNA)
debian:linux6.1.20-1 · 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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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 (2 more)

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

All records