CVE-2026-89864Hinoki check available

Kernel memory corruption via unchecked I2C length

Published Sep 16, 2026 · Updated Sep 16, 2026

Kernel memory corruption in Linux allows local users with CAP_SYS_RAWIO to corrupt heap and stack memory via qla2xxx I2C BSG requests. The qla2x00_write_i2c and qla2x00_read_i2c handlers use a caller-controlled 16-bit length for copies and DMA transfers without limiting it to the 64-byte embedded buffer. Access requires CAP_SYS_RAWIO and a qla2xxx I2C BSG path; oversized requests can overwrite a DMA-pool allocation and the kernel stack.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Kernel memory corruption in Linux allows local users with CAP_SYS_RAWIO to corrupt heap and stack memory via qla2xxx I2C BSG requests. The qla2x00_write_i2c and qla2x00_read_i2c handlers use a caller-controlled 16-bit length for copies and DMA transfers without limiting it to the 64-byte embedded buffer. Access requires CAP_SYS_RAWIO and a qla2xxx I2C BSG path; oversized requests can overwrite a DMA-pool allocation and the kernel stack.

The record

CVE
CVE-2026-89864
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=3.7
  2. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59
  3. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <2be39946abcde5a6416fb074ef728429e246a996
  4. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <32d6df14fdab71fe1ba304fd9a0db0411ea2e043
  5. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <47049fdadc0eaa115e813735b827e1379c0d2cf8
  6. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e
  7. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <8f01f886cc5e7bbc16cbf1a9928fdebbc911e973
  8. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <97ca58b0fb026799b99e3d552d5f69cf9a3113ad
  9. Affected versionversion=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <9a756f277eb89f769dbf380f38245c270d31fdb5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=3.7; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <2be39946abcde5a6416fb074ef728429e246a996; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <32d6df14fdab71fe1ba304fd9a0db0411ea2e043; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <47049fdadc0eaa115e813735b827e1379c0d2cf8; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <8f01f886cc5e7bbc16cbf1a9928fdebbc911e973; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <97ca58b0fb026799b99e3d552d5f69cf9a3113ad; version=9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae <9a756f277eb89f769dbf380f38245c270d31fdb5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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