CVE-2022-50677

Kernel memory corruption via stale IPMI interface dereference

Published Dec 9, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel IPMI message handler allows local users to corrupt kernel memory during IPMI user teardown. In _ipmi_destroy_user(), intf_free() releases the ipmi_smi object before module_put(intf->owner) reads and updates data through that freed pointer. Reachability requires local access to /dev/ipmiN and a concurrent final interface-reference drop during SMI unregister; successful exploitation can read or corrupt kernel memory or panic the host.

CVSS severity7.0
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel IPMI message handler allows local users to corrupt kernel memory during IPMI user teardown. In _ipmi_destroy_user(), intf_free() releases the ipmi_smi object before module_put(intf->owner) reads and updates data through that freed pointer. Reachability requires local access to /dev/ipmiN and a concurrent final interface-reference drop during SMI unregister; successful exploitation can read or corrupt kernel memory or panic the host.

The record

CVE
CVE-2022-50677
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record 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=4.19.92 <4.19.270
  2. Affected versionversion=5.4.7 <5.4.229
  3. Affected versionversion=5.5
  4. Affected versionversion=b642ced2cad496c32ae1f62b85fc395391190820 <d23006f2a56e11a3103de0ca8b843bf7fd7d76fc
  5. Affected versionversion=cbb79863fc3175ed5ac506465948b02a893a8235 <1fc9b20a7688000fcf4d7fbaa58e415a3cdda961
  6. Affected versionversion=cbb79863fc3175ed5ac506465948b02a893a8235 <a92ce570c81dc0feaeb12a429b4bc65686d17967
  7. Affected versionversion=cbb79863fc3175ed5ac506465948b02a893a8235 <bfce073089cb81482521c65061835aaa6d1a6cc0
  8. Affected versionversion=cbb79863fc3175ed5ac506465948b02a893a8235 <f29d127b372e1b7662397d92341d9f7de198ff99
  9. Affected versionversion=cbb79863fc3175ed5ac506465948b02a893a8235 <f7fde441198a9ecb130c3ccec91ee2131d6998ee
  10. Affected versionversion=f9d405a4bd6090ffbf3bba5e2da6b44c0e013cb3 <35ad87bfe330f7ef6a19f772223c63296d643172

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19.92 <4.19.270; version=5.4.7 <5.4.229; version=5.5; version=b642ced2cad496c32ae1f62b85fc395391190820 <d23006f2a56e11a3103de0ca8b843bf7fd7d76fc; version=cbb79863fc3175ed5ac506465948b02a893a8235 <1fc9b20a7688000fcf4d7fbaa58e415a3cdda961; version=cbb79863fc3175ed5ac506465948b02a893a8235 <a92ce570c81dc0feaeb12a429b4bc65686d17967; version=cbb79863fc3175ed5ac506465948b02a893a8235 <bfce073089cb81482521c65061835aaa6d1a6cc0; version=cbb79863fc3175ed5ac506465948b02a893a8235 <f29d127b372e1b7662397d92341d9f7de198ff99; version=cbb79863fc3175ed5ac506465948b02a893a8235 <f7fde441198a9ecb130c3ccec91ee2131d6998ee; version=f9d405a4bd6090ffbf3bba5e2da6b44c0e013cb3 <35ad87bfe330f7ef6a19f772223c63296d643172

Published CVSS scores

7.0LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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