CVE-2026-43222

Kernel memory corruption via undersized AV1 tile buffer

Published May 6, 2026 · Updated May 6, 2026

An out-of-bounds write in the Linux Kernel Verisilicon AV1 decoder allows local users to corrupt kernel memory via crafted AV1 data. The decoder allocates the tile-info buffer with an undersized constant, then writes row_sb, col_sb, start_pos, and end_pos as four 32-bit fields for every tile. Reachability requires a local low-privileged user and the Verisilicon AV1 decoder path; the overwrite exposes kernel confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds write in the Linux Kernel Verisilicon AV1 decoder allows local users to corrupt kernel memory via crafted AV1 data. The decoder allocates the tile-info buffer with an undersized constant, then writes row_sb, col_sb, start_pos, and end_pos as four 32-bit fields for every tile. Reachability requires a local low-privileged user and the Verisilicon AV1 decoder path; the overwrite exposes kernel confidentiality, integrity, and availability.

The record

CVE
CVE-2026-43222
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=6.5
  2. Affected versionversion=727a400686a2c0d25015c9e44916a59b72882f83 <34f36f9c6114af781a5a4f7a7c99334c85b73fc7
  3. Affected versionversion=727a400686a2c0d25015c9e44916a59b72882f83 <74abfadd7ef5ac9f3a6111d550cc651d1457c641
  4. Affected versionversion=727a400686a2c0d25015c9e44916a59b72882f83 <a505ca2db89ad92a8d8d27fa68ebafb12e04a679
  5. Affected versionversion=727a400686a2c0d25015c9e44916a59b72882f83 <a5b1ddbe31f49b4da78642157589970e9b60a231
  6. Affected versionversion=727a400686a2c0d25015c9e44916a59b72882f83 <f122f2b3ce9dbde60bf7ab0b180fe4a01f9d9bc4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.5; version=727a400686a2c0d25015c9e44916a59b72882f83 <34f36f9c6114af781a5a4f7a7c99334c85b73fc7; version=727a400686a2c0d25015c9e44916a59b72882f83 <74abfadd7ef5ac9f3a6111d550cc651d1457c641; version=727a400686a2c0d25015c9e44916a59b72882f83 <a505ca2db89ad92a8d8d27fa68ebafb12e04a679; version=727a400686a2c0d25015c9e44916a59b72882f83 <a5b1ddbe31f49b4da78642157589970e9b60a231; version=727a400686a2c0d25015c9e44916a59b72882f83 <f122f2b3ce9dbde60bf7ab0b180fe4a01f9d9bc4

Published CVSS scores

7.8kernel.orgCVSS: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.

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

T1068Exploitation for Privilege Escalation

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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