CVE-2022-50707

Kernel memory leak via unfreed control request

Published Dec 24, 2025 · Updated Dec 24, 2025

Memory leak in Linux kernel 5.19 through affected 6.x branches leaves kernel memory allocated after a virtio-crypto error. The virtio_crypto_alg_skcipher_close_session() error path allocates vc_ctrl_req but exits on an invalid ctrl_status status without freeing it. Reaching the leak requires a virtio-crypto device and an invalid close-session response; published sources do not define an attacker path or resulting service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
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 5.19 through affected 6.x branches leaves kernel memory allocated after a virtio-crypto error. The virtio_crypto_alg_skcipher_close_session() error path allocates vc_ctrl_req but exits on an invalid ctrl_status status without freeing it. Reaching the leak requires a virtio-crypto device and an invalid close-session response; published sources do not define an attacker path or resulting service interruption.

The record

CVE
CVE-2022-50707
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=0756ad15b1fef287d4d8fa11bc36ea77a5c42e4a <0871df190fe6723464efe0f493d476411616f553
  2. Affected versionversion=0756ad15b1fef287d4d8fa11bc36ea77a5c42e4a <67fb59ff1384e338679c0eb7a43c83ce8868c9fa
  3. Affected versionversion=0756ad15b1fef287d4d8fa11bc36ea77a5c42e4a <b1d65f717cd6305a396a8738e022c6f7c65cfbe8
  4. Affected versionversion=4ee475e76b5ea8061970a7c867ffa5eedeb39580 <79026a2d0a1b080257773d22a493f9bcab8c65be
  5. Affected versionversion=5.19

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0756ad15b1fef287d4d8fa11bc36ea77a5c42e4a <0871df190fe6723464efe0f493d476411616f553; version=0756ad15b1fef287d4d8fa11bc36ea77a5c42e4a <67fb59ff1384e338679c0eb7a43c83ce8868c9fa; version=0756ad15b1fef287d4d8fa11bc36ea77a5c42e4a <b1d65f717cd6305a396a8738e022c6f7c65cfbe8; version=4ee475e76b5ea8061970a7c867ffa5eedeb39580 <79026a2d0a1b080257773d22a493f9bcab8c65be; version=5.19

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)
VectorUnavailable
PrivilegesUnavailable
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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