CVE-2022-48732

Console loss via BIOS boundary off-by-one

Published Jun 20, 2024 · Updated May 11, 2026

An off-by-one error in the Linux kernel Nouveau BIOS parser rejects the final ROM byte and prevents console initialization. The nvbios_addr function treats an access ending exactly at bios->size as out of bounds because it uses a greater-than-or-equal comparison instead of greater-than. The failure is limited to systems such as Apple eMacs with GeForce 2 MX GPUs whose OpenFirmware ROM image ends at the last used byte, leaving no working console.

CVSS severity7.8
High
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

An off-by-one error in the Linux kernel Nouveau BIOS parser rejects the final ROM byte and prevents console initialization. The nvbios_addr function treats an access ending exactly at bios->size as out of bounds because it uses a greater-than-or-equal comparison instead of greater-than. The failure is limited to systems such as Apple eMacs with GeForce 2 MX GPUs whose OpenFirmware ROM image ends at the last used byte, leaving no working console.

The record

CVE
CVE-2022-48732
Published
Jun 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-193
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 20, 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=4.8
  2. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <1b777d4d9e383d2744fc9b3a09af6ec1893c8b1a
  3. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2
  4. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <acc887ba88333f5fec49631f12d8cc7ebd95781c
  5. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <b2a21669ee98aafc41c6d42ef15af4dab9e6e882
  6. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <d4b746e60fd8eaa8016e144223abe91158edcdad
  7. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <d877e814a62b7de9069aeff8bc1d979dfc996e06
  8. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <e7c36fa8a1e63b08312162179c78a0c7795ea369
  9. Affected versionversion=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <f071d9fa857582d7bd77f4906691f73d3edeab73

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <1b777d4d9e383d2744fc9b3a09af6ec1893c8b1a; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <909d3ec1bf9f0ec534bfc081b77c0836fea7b0e2; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <acc887ba88333f5fec49631f12d8cc7ebd95781c; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <b2a21669ee98aafc41c6d42ef15af4dab9e6e882; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <d4b746e60fd8eaa8016e144223abe91158edcdad; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <d877e814a62b7de9069aeff8bc1d979dfc996e06; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <e7c36fa8a1e63b08312162179c78a0c7795ea369; version=4d4e9907ff572bb1d1c0f6913ad6e3d6d4525077 <f071d9fa857582d7bd77f4906691f73d3edeab73

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-193Off-by-one Error

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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