CVE-2022-50821Network attack vector

Kernel memory consumption via leaked GSS handle

Published Dec 30, 2025 · Updated Dec 30, 2025

Memory leak in Linux kernel SUNRPC authentication allows remote attackers to consume kernel memory via an oversized RPCSEC_GSS verifier. In gss_read_proxy_verf(), dup_netobj() allocates the incoming context handle before the code rejects a verifier length larger than the request buffer without freeing that handle. Each rejected request therefore leaves kernel memory allocated when the server-side gssproxy RPCGSS authentication path is enabled.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
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 Linux kernel SUNRPC authentication allows remote attackers to consume kernel memory via an oversized RPCSEC_GSS verifier. In gss_read_proxy_verf(), dup_netobj() allocates the incoming context handle before the code rejects a verifier length larger than the request buffer without freeing that handle. Each rejected request therefore leaves kernel memory allocated when the server-side gssproxy RPCGSS authentication path is enabled.

The record

CVE
CVE-2022-50821
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <2cd6026e257362f030c8be57abaf7fc0049df60a
  2. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <67eb848161c2799f2007968ea3bc87adb15c9567
  3. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <76f2497a2faa6a4e91efb94a7f55705b403273fd
  4. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <aa91afe597401b78baa7d751c71eedb92c80bd4d
  5. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <c9ded831e2552b9c3cab7e2591a190e94f9d29c0
  6. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <d01fa993eb7fbc305f0a9c3e8bfac6513efc13b6
  7. Affected versionversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <da522b5fe1a5f8b7c20a0023e87b52a150e53bf5
  8. Affected versionversion=3.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <2cd6026e257362f030c8be57abaf7fc0049df60a; version=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <67eb848161c2799f2007968ea3bc87adb15c9567; version=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <76f2497a2faa6a4e91efb94a7f55705b403273fd; version=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <aa91afe597401b78baa7d751c71eedb92c80bd4d; version=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <c9ded831e2552b9c3cab7e2591a190e94f9d29c0; version=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <d01fa993eb7fbc305f0a9c3e8bfac6513efc13b6; version=030d794bf49855f5e2a9e8dfbfad34211d1eb08b <da522b5fe1a5f8b7c20a0023e87b52a150e53bf5; version=3.10

Published CVSS scores

No CVSS assessment is available in this record.

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)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.001Endpoint Denial of Service: OS Exhaustion Flood

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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