CVE-2026-68184

Kernel-stack disclosure via stale MODE SELECT length

Published Aug 10, 2026 · Updated Aug 10, 2026

Stack out-of-bounds read in affected Linux kernel releases allows local users to send kernel stack data to an optical drive. mmc_ioctl_cdrom_volume() advances a 32-byte stack-buffer pointer by eight bytes for MODE SELECT but leaves cgc->buflen at 32, so cdrom_mode_select() reads beyond the buffer. The CDROMVOLCTRL path requires an accessible optical drive that reports a nonzero block-descriptor length; CDROMVOLREAD does not trigger the overread.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack out-of-bounds read in affected Linux kernel releases allows local users to send kernel stack data to an optical drive. mmc_ioctl_cdrom_volume() advances a 32-byte stack-buffer pointer by eight bytes for MODE SELECT but leaves cgc->buflen at 32, so cdrom_mode_select() reads beyond the buffer. The CDROMVOLCTRL path requires an accessible optical drive that reports a nonzero block-descriptor length; CDROMVOLREAD does not trigger the overread.

The record

CVE
CVE-2026-68184
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <35b68e24c5a69fa4545f46f05f6c849223034cb6
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7344c84e32413e5c8832f74b8a612b0194e5c051
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b27e195d4db8dea263050bdbeb11881b2999c9c6
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d43c5c0c935522deae7339e0c2399365f3bf0016
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3e2715a150066f09aa82c30fa983fb184ad6dd5
  6. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <35b68e24c5a69fa4545f46f05f6c849223034cb6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7344c84e32413e5c8832f74b8a612b0194e5c051; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b27e195d4db8dea263050bdbeb11881b2999c9c6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d43c5c0c935522deae7339e0c2399365f3bf0016; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f3e2715a150066f09aa82c30fa983fb184ad6dd5; version=2.6.12

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.

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

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo