CVE-2022-48762

Kernel crash via misdecoded exception-table register indices

Published Jun 20, 2024 · Updated Aug 5, 2026

NULL pointer dereference in Linux kernel 5.16 through 5.16.4 allows local users to crash arm64 systems through pathname processing. In ex_handler_load_unaligned_zeropad(), register indices are read from the constant ex->type field instead of ex->data, forcing X0 to be dereferenced and corrupting X4. The demonstrated path requires an arm64 kernel with memory tagging and a fault during pathname hashing; the resulting NULL dereference interrupts the host.

CVSS severity6.2
Medium
EPSS probability0.19%
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 kernel 5.16 through 5.16.4 allows local users to crash arm64 systems through pathname processing. In ex_handler_load_unaligned_zeropad(), register indices are read from the constant ex->type field instead of ex->data, forcing X0 to be dereferenced and corrupting X4. The demonstrated path requires an arm64 kernel with memory tagging and a fault during pathname hashing; the resulting NULL dereference interrupts the host.

The record

CVE
CVE-2022-48762
Published
Jun 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE 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=5.16
  2. Affected versionversion=753b32368705c396000f95f33c3b7018474e33ad <3758a6c74e08bdc15ccccd6872a6ad37d165239a
  3. Affected versionversion=753b32368705c396000f95f33c3b7018474e33ad <47fe7a1c5e3e011eeb4ab79f2d54a794fdd1c3eb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=753b32368705c396000f95f33c3b7018474e33ad <3758a6c74e08bdc15ccccd6872a6ad37d165239a; version=753b32368705c396000f95f33c3b7018474e33ad <47fe7a1c5e3e011eeb4ab79f2d54a794fdd1c3eb

Published CVSS scores

6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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