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NVD / CVE Program· CNA Linux

CVE-2026-68253: drm/i915/hdcp: check streams[] bounds before overflow

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2106fb490b2c6003e23ad6ff36ce823a2170e138, 336cf6d80d41457442b659e7ba7a7badc0ffe79d, 389079bf04e6f0c6f10f5b879f6d7a9cf80f0567; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2106fb490b2c6003e23ad6ff36ce823a2170e138, 336cf6d80d41457442b659e7ba7a7badc0ffe79d, 389079bf04e6f0c6f10f5b879f6d7a9cf80f0567; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 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: drm/i915/hdcp: check streams[] bounds before overflow The data->streams[] overflow check is done after the buffer overflow has already happened. Move the overflow check before the write. Side note, emitting a warning splat with a backtrace might be overkill here, but prefer not changing the behaviour other than not doing the overrun. Discovered using AI-assisted static analysis confirmed by Intel Product Security. (cherry picked from commit 9284ab3b6e776c315883ac2611283d263c9460fd)

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 10, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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.

Follow CVE-2026-68253

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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

    • 5.12affected
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before 336cf6d80d41457442b659e7ba7a7badc0ffe79daffected · git
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before 389079bf04e6f0c6f10f5b879f6d7a9cf80f0567affected · git
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before 84351f12390349ba010920fc247e1a0b12e41eb3affected · git
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before 2106fb490b2c6003e23ad6ff36ce823a2170e138affected · git
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before 3d2ef8d389495e7889c6062d8bddc46d2a5fbdefaffected · git
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before 984085c5b53572e2e03fd5fc4817e86ef1effc6eaffected · git
    • e03187e12cae57c09b521b6f7dd7c7f9aa2b62e9 and later · before bbb15a6b042d02e5508a02b4847e02d2579ee7bcaffected · git
    • before 5.12not affected · semver
    • 5.15.217 and later · up to and including 5.15.*not 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 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
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-2026-68245Aug 10, 2026 · drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()
    31Monitor
  • ← EarlierCVE-2026-68247Aug 10, 2026 · drm/i915/bios: range check LFP Data Block panel_type2
    0Monitor
  • Later →CVE-2026-68255Aug 10, 2026 · drm/virtio: bound EDID block reads to the response buffer
    30Monitor

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 Linux2106fb490b2c6003e23ad6ff36ce823a2170e138Vendor (CNA)
Linux Linux336cf6d80d41457442b659e7ba7a7badc0ffe79dVendor (CNA)
Linux Linux389079bf04e6f0c6f10f5b879f6d7a9cf80f0567Vendor (CNA)
Linux Linux3d2ef8d389495e7889c6062d8bddc46d2a5fbdefVendor (CNA)
Linux Linux84351f12390349ba010920fc247e1a0b12e41eb3Vendor (CNA)
Linux Linux984085c5b53572e2e03fd5fc4817e86ef1effc6eVendor (CNA)
Linux Linuxbbb15a6b042d02e5508a02b4847e02d2579ee7bcVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~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).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-720985 days apartdm-verity: fix buffer overflow in FEC calculation
    39Monitor
  • CVE-2025-68811209 days apartsvcrdma: use rc_pageoff for memcpy byte offset
    39Monitor
  • CVE-2026-681280 days apartice: reject out-of-range ptype in ice_parser_profile_init
    35Monitor
  • CVE-2026-6391622 days apartHID: wacom: Fix OOB write in wacom_hid_set_device_mode()
    35Monitor
  • CVE-2026-6455214 days apartvirtio-net: fix len check in receive_big()
    33Monitor
  • CVE-2026-6451516 days apartwifi: mac80211: fix MLE defragmentation
    33Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

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

All records