CVE-2026-99098Public exploit

Kernel panic via oversized inline-tag padding

Published Oct 26, 2026 · Updated Oct 26, 2026

A stack overflow in Linux dm-integrity allows local users with root privileges to panic the kernel via oversized inline integrity tags. The integrity_sector_checksum function zero-pads results to the configured tag size, exceeding the HASH_MAX_DIGESTSIZE stack buffers in dm_integrity_check and dm_integrity_inline_recheck. With CONFIG_STACKPROTECTOR, the first read causes a panic; upstream considers the issue non-security because triggering it requires root.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Nov 1, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack overflow in Linux dm-integrity allows local users with root privileges to panic the kernel via oversized inline integrity tags. The integrity_sector_checksum function zero-pads results to the configured tag size, exceeding the HASH_MAX_DIGESTSIZE stack buffers in dm_integrity_check and dm_integrity_inline_recheck. With CONFIG_STACKPROTECTOR, the first read causes a panic; upstream considers the issue non-security because triggering it requires root.

The record

CVE
CVE-2026-99098
Published
Oct 26, 2026
Updated
Oct 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 26, 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=6.11
  2. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <3c7aad85aeb9e28386672e3a009aa2e61f751b86
  3. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <4f0ee735dc68e3e6c4dd9a666d7f7047163c4165
  4. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <764b683a6180fd72c931c13fea98d383506a3475
  5. Affected versionversion=fb0987682c629c1d2c476f35f6fde405a5e304a4 <f49cd7820cd0a96f20e1aa2708adb002124e38a7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <3c7aad85aeb9e28386672e3a009aa2e61f751b86; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <4f0ee735dc68e3e6c4dd9a666d7f7047163c4165; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <764b683a6180fd72c931c13fea98d383506a3475; version=fb0987682c629c1d2c476f35f6fde405a5e304a4 <f49cd7820cd0a96f20e1aa2708adb002124e38a7

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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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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