CVE-2026-80748

Out-of-bounds access via scatterlist double indexing

Published Sep 3, 2026 · Updated Sep 3, 2026

Out-of-bounds access in the Loongson2 MMC driver in Linux 6.17 allows attackers to trigger incorrect scatterlist access during data reordering. The ls2k0500_mmc_reorder_cmd_data() and ls2k2000_mmc_reorder_cmd_data() loops treat the current sg entry as an array base and index it again, selecting wrong or out-of-bounds entries. Reachability requires the Loongson2 MMC host driver and its data-reorder path; Linux has not published whether the access causes disclosure, corruption, or a crash.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
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 access in the Loongson2 MMC driver in Linux 6.17 allows attackers to trigger incorrect scatterlist access during data reordering. The ls2k0500_mmc_reorder_cmd_data() and ls2k2000_mmc_reorder_cmd_data() loops treat the current sg entry as an array base and index it again, selecting wrong or out-of-bounds entries. Reachability requires the Loongson2 MMC host driver and its data-reorder path; Linux has not published whether the access causes disclosure, corruption, or a crash.

The record

CVE
CVE-2026-80748
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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?

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  1. Affected versionversion=2115772014bdac368317e997ed15016cf2792665 <00179ed9fbe07799676e2cb63c4e7f0e7cd80a5c
  2. Affected versionversion=2115772014bdac368317e997ed15016cf2792665 <8f7f7a6d5aed8f346a1c936fba02033c73a337dc
  3. Affected versionversion=2115772014bdac368317e997ed15016cf2792665 <db368164383c46f256ed8152a41ae9300e615028
  4. Affected versionversion=6.17

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=2115772014bdac368317e997ed15016cf2792665 <00179ed9fbe07799676e2cb63c4e7f0e7cd80a5c; version=2115772014bdac368317e997ed15016cf2792665 <8f7f7a6d5aed8f346a1c936fba02033c73a337dc; version=2115772014bdac368317e997ed15016cf2792665 <db368164383c46f256ed8152a41ae9300e615028; version=6.17

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 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

No sourced classifications are available.

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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