CVE-2022-50570

Local kernel compromise via unchecked ioctl length

Published Oct 22, 2025 · Updated Oct 22, 2025

Stack buffer overflow in the Linux kernel allows local users to corrupt kernel memory through the CROS_EC_DEV_IOCRDMEM ioctl. The cros_ec_chardev_ioctl_readmem handler passes attacker-controlled s_mem.bytes to cmd_readmem without checking it against the fixed s_mem.buffer size. Access to /dev/cros_ec is required; an oversized read writes beyond the kernel stack buffer, enabling a kernel crash or host compromise.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in the Linux kernel allows local users to corrupt kernel memory through the CROS_EC_DEV_IOCRDMEM ioctl. The cros_ec_chardev_ioctl_readmem handler passes attacker-controlled s_mem.bytes to cmd_readmem without checking it against the fixed s_mem.buffer size. Access to /dev/cros_ec is required; an oversized read writes beyond the kernel stack buffer, enabling a kernel crash or host compromise.

The record

CVE
CVE-2022-50570
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=5.4
  2. Affected versionversion=eda2e30c6684d67288edb841c6125d48c608a242 <0c2e18924504208644d18415667895a4ac54cf2a
  3. Affected versionversion=eda2e30c6684d67288edb841c6125d48c608a242 <868fc93b615b9f6c2b0b1894536618fa6cd66acc
  4. Affected versionversion=eda2e30c6684d67288edb841c6125d48c608a242 <8a07b45fd3c2dda24fad43639be5335a4595196a
  5. Affected versionversion=eda2e30c6684d67288edb841c6125d48c608a242 <e548f9503c4b3292a60a63fe77dccea62999a35a
  6. Affected versionversion=eda2e30c6684d67288edb841c6125d48c608a242 <f143f1d9a8e5c6c9db3de81ca270191226fcce36
  7. Affected versionversion=eda2e30c6684d67288edb841c6125d48c608a242 <fd1d3b265784a2243fcaef06aebfb2f8ee733cec

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.4; version=eda2e30c6684d67288edb841c6125d48c608a242 <0c2e18924504208644d18415667895a4ac54cf2a; version=eda2e30c6684d67288edb841c6125d48c608a242 <868fc93b615b9f6c2b0b1894536618fa6cd66acc; version=eda2e30c6684d67288edb841c6125d48c608a242 <8a07b45fd3c2dda24fad43639be5335a4595196a; version=eda2e30c6684d67288edb841c6125d48c608a242 <e548f9503c4b3292a60a63fe77dccea62999a35a; version=eda2e30c6684d67288edb841c6125d48c608a242 <f143f1d9a8e5c6c9db3de81ca270191226fcce36; version=eda2e30c6684d67288edb841c6125d48c608a242 <fd1d3b265784a2243fcaef06aebfb2f8ee733cec

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1068Exploitation for Privilege Escalation

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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