CVE-2022-48741

Host crash via invalid copy-up warning argument

Published Jun 20, 2024 · Updated May 23, 2026

NULL pointer dereference in Linux 5.15.3 through 5.15.19 and 5.16 through 5.16.5 allows local users to crash the kernel via OverlayFS copy-up. In ovl_copy_fileattr(), a failed lower-file attribute lookup passes a struct path instead of its dentry to a %pd2 warning formatter, causing an invalid dereference. Triggering the fault requires copy-up of a file carrying sync or noatime attributes to a tmpfs upper layer; the resulting crash interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.22%
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 5.15.3 through 5.15.19 and 5.16 through 5.16.5 allows local users to crash the kernel via OverlayFS copy-up. In ovl_copy_fileattr(), a failed lower-file attribute lookup passes a struct path instead of its dentry to a %pd2 warning formatter, causing an invalid dereference. Triggering the fault requires copy-up of a file carrying sync or noatime attributes to a tmpfs upper layer; the resulting crash interrupts the host.

The record

CVE
CVE-2022-48741
Published
Jun 20, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.15.3 <5.15.20
  2. Affected versionversion=5.16
  3. Affected versionversion=5b0a414d06c3ed2097e32ef7944a4abb644b89bd <4ee7e4a6c9b298da44029ed9ec8ed23ae49cc209
  4. Affected versionversion=5b0a414d06c3ed2097e32ef7944a4abb644b89bd <9c7f8a35c5a83740c0e3ea540b6ad145c50d79aa
  5. Affected versionversion=5cffa333a2b263821561328cc75a3ffc8097d093 <e6b678c1a3673de6a5d2f4e22bb725a086a0701a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15.3 <5.15.20; version=5.16; version=5b0a414d06c3ed2097e32ef7944a4abb644b89bd <4ee7e4a6c9b298da44029ed9ec8ed23ae49cc209; version=5b0a414d06c3ed2097e32ef7944a4abb644b89bd <9c7f8a35c5a83740c0e3ea540b6ad145c50d79aa; version=5cffa333a2b263821561328cc75a3ffc8097d093 <e6b678c1a3673de6a5d2f4e22bb725a086a0701a

Published CVSS scores

5.5NIST NVDCVSS: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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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