CVE-2026-64273

Kernel memory corruption via unchecked effect index

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds write in the iforce input driver in Linux Kernel allows physically proximate attackers to corrupt kernel memory via a crafted device. iforce_process_packet() masks status byte data[1] to seven bits but uses values up to 127 to index the 32-entry core_effects array, causing a single-bit read-modify-write beyond the object. Access requires a malicious or counterfeit USB or serio device; well-formed devices remain within bounds, while malformed status packets can corrupt adjacent kernel state.

CVSS severity7.8
High
EPSS probability0.17%
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 write in the iforce input driver in Linux Kernel allows physically proximate attackers to corrupt kernel memory via a crafted device. iforce_process_packet() masks status byte data[1] to seven bits but uses values up to 127 to index the 32-entry core_effects array, causing a single-bit read-modify-write beyond the object. Access requires a malicious or counterfeit USB or serio device; well-formed devices remain within bounds, while malformed status packets can corrupt adjacent kernel state.

The record

CVE
CVE-2026-64273
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-129, CWE-787, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0e9943d2e4c63496b6ca84bc66fd3c71d40558e2
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6c0f2901c9d325d4a0574c4237fd507810d225ff
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <70019779325f2bb5f5a4098e91e79c655f50fcef
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a40250f97c312e000e3616c9074022311a0efbc3
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b1b79e89bc33e4c682d3df7ae2aadc62b5a0c310
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c21295616a8a52b9a5f18cd4ca8c73030eda3d4f
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d10b0507fa0f5b46764b178e3271f9012f2df677
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e5fa31f0550b55d80045669ae9080dd5b88abffa
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0e9943d2e4c63496b6ca84bc66fd3c71d40558e2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6c0f2901c9d325d4a0574c4237fd507810d225ff; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <70019779325f2bb5f5a4098e91e79c655f50fcef; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a40250f97c312e000e3616c9074022311a0efbc3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b1b79e89bc33e4c682d3df7ae2aadc62b5a0c310; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c21295616a8a52b9a5f18cd4ca8c73030eda3d4f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d10b0507fa0f5b46764b178e3271f9012f2df677; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e5fa31f0550b55d80045669ae9080dd5b88abffa; version=2.6.12

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.1Amazon LinuxCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
CWE-787Out-of-bounds Write
T1200Hardware Additions

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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