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NVD / CVE Program· CNA Linux

CVE-2026-68184: cdrom: fix stack out-of-bounds read in CDROMVOLCTRL

—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0329b661349f42f9616f2733da67edffbbb8455d, 35b68e24c5a69fa4545f46f05f6c849223034cb6, 45c65df5339deea3cf204902aac383fe995941a7; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0329b661349f42f9616f2733da67edffbbb8455d, 35b68e24c5a69fa4545f46f05f6c849223034cb6, 45c65df5339deea3cf204902aac383fe995941a7; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: cdrom: fix stack out-of-bounds read in CDROMVOLCTRL mmc_ioctl_cdrom_volume() first reads the audio control mode page into a 32-byte stack buffer with cgc->buflen set to 24. If the device reports a block descriptor, the function increases cgc->buflen to include that descriptor and reads the page again. For CDROMVOLCTRL, the function then builds a MODE SELECT parameter list by moving cgc->buffer forward by offset - 8 bytes. This drops the block descriptor from the outgoing payload and leaves a new 8-byte mode parameter header in front of the audio control page. However, cgc->buflen is left unchanged. With a standard 8-byte block descriptor, cgc->buffer points at buffer + 8 but cgc->buflen remains 32. cdrom_mode_select() therefore asks the low level packet path to write 32 bytes from that adjusted pointer, reading 8 bytes past the end of the 32-byte stack buffer. This is not hit by CDROMVOLREAD, and CDROMVOLCTRL only triggers it on drives that return a non-zero block descriptor length, which helps explain why it has gone unnoticed. The overread is also sent to the device as extra MODE SELECT payload, so it may not produce an obvious local failure. Reduce cgc->buflen by the same amount as the buffer pointer adjustment so the MODE SELECT transfer covers only the intended parameter list.

Published
Aug 10, 2026
Updated
Nov 6, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 45c65df5339deea3cf204902aac383fe995941a7affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0329b661349f42f9616f2733da67edffbbb8455daffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e150c9a10baee55d3bfbc96dbe66b205e8b4fd44affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 7344c84e32413e5c8832f74b8a612b0194e5c051affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 35b68e24c5a69fa4545f46f05f6c849223034cb6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d43c5c0c935522deae7339e0c2399365f3bf0016affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f3e2715a150066f09aa82c30fa983fb184ad6dd5affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b27e195d4db8dea263050bdbeb11881b2999c9c6affected · git
    • before 2.6.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68179Aug 10, 2026 · misc: nsm: only unlock nsm_dev on post-lock error paths
    33Monitor
  • ← EarlierCVE-2026-68180Aug 10, 2026 · intel_th: fix MSC output device reference leak
    0Monitor
  • Later →CVE-2026-68185Aug 10, 2026 · LoongArch: Move jump_label_init() before parse_early_param()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0329b661349f42f9616f2733da67edffbbb8455dVendor (CNA)
Linux Linux35b68e24c5a69fa4545f46f05f6c849223034cb6Vendor (CNA)
Linux Linux45c65df5339deea3cf204902aac383fe995941a7Vendor (CNA)
Linux Linux7344c84e32413e5c8832f74b8a612b0194e5c051Vendor (CNA)
Linux Linuxb27e195d4db8dea263050bdbeb11881b2999c9c6Vendor (CNA)
Linux Linuxd43c5c0c935522deae7339e0c2399365f3bf0016Vendor (CNA)
Linux Linuxe150c9a10baee55d3bfbc96dbe66b205e8b4fd44Vendor (CNA)
Linux Linuxf3e2715a150066f09aa82c30fa983fb184ad6dd5Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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