CVE-2022-48798

Local denial of service via unchecked path_event callback

Published Jul 16, 2024 · Updated May 11, 2026

NULL pointer dereference in Linux 5.11 through 5.15.23 and 5.16 through 5.16.9 allows local users to crash s390 systems via an FCES path event. In drivers/s390/cio/device.c, the common I/O handler dereferences the device driver and invokes path_event without verifying that both exist. Reachability requires local access to an s390 system and an FCES event for a channel device lacking an attached driver or callback; the resulting kernel panic interrupts the system.

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

NULL pointer dereference in Linux 5.11 through 5.15.23 and 5.16 through 5.16.9 allows local users to crash s390 systems via an FCES path event. In drivers/s390/cio/device.c, the common I/O handler dereferences the device driver and invokes path_event without verifying that both exist. Reachability requires local access to an s390 system and an FCES event for a channel device lacking an attached driver or callback; the resulting kernel panic interrupts the system.

The record

CVE
CVE-2022-48798
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2024CVE 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

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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=32ef938815c1fb42d65212aac860ab153a64de1a <a0619027f11590b2070624297530c34dc7f91bcd
  2. Affected versionversion=32ef938815c1fb42d65212aac860ab153a64de1a <dd9cb842fa9d90653a9b48aba52f89c069f3bc50
  3. Affected versionversion=32ef938815c1fb42d65212aac860ab153a64de1a <fe990b7bf6ac93f1d850d076b8f0e758268aa4ab
  4. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=32ef938815c1fb42d65212aac860ab153a64de1a <a0619027f11590b2070624297530c34dc7f91bcd; version=32ef938815c1fb42d65212aac860ab153a64de1a <dd9cb842fa9d90653a9b48aba52f89c069f3bc50; version=32ef938815c1fb42d65212aac860ab153a64de1a <fe990b7bf6ac93f1d850d076b8f0e758268aa4ab; version=5.11

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 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

T1499Endpoint Denial of Service

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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