CVE-2022-50662

Kernel memory exhaustion via unreleased RDMA key

Published Dec 9, 2025 · Updated May 11, 2026

Memory leak in the HNS RDMA driver in the Linux kernel allows attackers to exhaust kernel memory via unspecified vectors. When hns_roce_mr_enable() fails inside hns_roce_alloc_mr(), the error path returns without releasing the allocated mr_key. Public records do not describe how attackers can trigger that failure; successful repetition consumes kernel memory and can interrupt service.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the HNS RDMA driver in the Linux kernel allows attackers to exhaust kernel memory via unspecified vectors. When hns_roce_mr_enable() fails inside hns_roce_alloc_mr(), the error path returns without releasing the allocated mr_key. Public records do not describe how attackers can trigger that failure; successful repetition consumes kernel memory and can interrupt service.

The record

CVE
CVE-2022-50662
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.8
  2. Affected versionversion=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <164fa80330a81db67c26d10d071083941d29a510
  3. Affected versionversion=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <35f9cd060e68ff910e49bf37b1b0d336a311849a
  4. Affected versionversion=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <a115aa00b18f7b8982b8f458149632caf64a862a
  5. Affected versionversion=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <fc2c43bf41c89e7451fe750025ae55eb2e2a741d
  6. Affected versionversion=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <fd32e378bc1dea0d48767adf2bbb478581bb0a95

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <164fa80330a81db67c26d10d071083941d29a510; version=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <35f9cd060e68ff910e49bf37b1b0d336a311849a; version=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <a115aa00b18f7b8982b8f458149632caf64a862a; version=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <fc2c43bf41c89e7451fe750025ae55eb2e2a741d; version=9b2cf76c9f052987ae5c4ad450ebebdc7c5d7b87 <fd32e378bc1dea0d48767adf2bbb478581bb0a95

Published CVSS scores

5.5TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.6TenableAV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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