CVE-2022-48739

Kernel memory disclosure and crash via undersized buffer

Published Jun 20, 2024 · Updated Aug 5, 2026

Out-of-bounds read in the Linux hdmi-codec driver allows local users to disclose kernel memory or crash the system. The driver's five-byte iec_status buffer receives a 24-byte memcpy from an snd_aes_iec958 status array, so the copy reads beyond the slab object. Exploitation requires local low-privileged access and an active HDMI codec path; no data modification is reported.

CVSS severity7.1
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux hdmi-codec driver allows local users to disclose kernel memory or crash the system. The driver's five-byte iec_status buffer receives a 24-byte memcpy from an snd_aes_iec958 status array, so the copy reads beyond the slab object. Exploitation requires local low-privileged access and an active HDMI codec path; no data modification is reported.

The record

CVE
CVE-2022-48739
Published
Jun 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

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

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=5.14
  2. Affected versionversion=7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 <06feec6005c9d9500cd286ec440aabf8b2ddd94d
  3. Affected versionversion=7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 <10007bd96b6c4c3cfaea9e76c311b06a07a5e260
  4. Affected versionversion=7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 <1552e66be325a21d7eff49f46013fb402165a0ac

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 <06feec6005c9d9500cd286ec440aabf8b2ddd94d; version=7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 <10007bd96b6c4c3cfaea9e76c311b06a07a5e260; version=7a8e1d44211e16eb394b7b9e0b236ee1503a3ad3 <1552e66be325a21d7eff49f46013fb402165a0ac

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-125Out-of-bounds Read

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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