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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-99118: drm/i915/dmc: Harden DMC firmware payload parsing

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: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d, 0e396088fa5c1f96ff43de29c2a2f8807078723d, 4589ad76a6b1011538600ad398baf0b7d73a1252; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d, 0e396088fa5c1f96ff43de29c2a2f8807078723d, 4589ad76a6b1011538600ad398baf0b7d73a1252; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1 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/dmc: Harden DMC firmware payload parsing Validate the conversion of the DMC firmware size from dwords to bytes using check_mul_overflow() before calculating the firmware payload size. Reject zero-length payloads and zero MMIO counts in the DMC firmware header so malformed firmware is caught early. Also set dmc_fw_size only after the payload allocation succeeds. (cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)

—No exploit Fix available
Published
Oct 28, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 8th 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 · 0.1%

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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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

    • 4.2affected
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before 0e396088fa5c1f96ff43de29c2a2f8807078723daffected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before 53068cf3851dd4e00e8e668563e0353d9d79a98baffected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before e33921271d4438f4a24014f560e5ab297d7eda3faffected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before 4589ad76a6b1011538600ad398baf0b7d73a1252affected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before eb7a0ba650d607976d1a0a5e7501d3f14b35d026affected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aaaffected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6daffected · git
    • eb805623d8b161342ed9c9caf366f0a295041a6d and later · before 8bb1858db453cd4250e3b633f5d2d09206024ca6affected · git
    • before 4.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.115-26.12.115-2

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-2026-99116Oct 28, 2026 · net: psp: do not inherit the Rx association on clone
    31Monitor
  • ← EarlierCVE-2026-99117Oct 28, 2026 · net: bridge: mcast: don't truncate the port group walk on teardown
    31Monitor
  • Later →CVE-2026-99119Oct 28, 2026 · drm/amdgpu/userq: actually validate userq BOs
    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 Linux05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6dVendor (CNA)
Linux Linux0e396088fa5c1f96ff43de29c2a2f8807078723dVendor (CNA)
Linux Linux4589ad76a6b1011538600ad398baf0b7d73a1252Vendor (CNA)
Linux Linux53068cf3851dd4e00e8e668563e0353d9d79a98bVendor (CNA)
Linux Linux8bb1858db453cd4250e3b633f5d2d09206024ca6Vendor (CNA)
Linux Linuxdfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aaVendor (CNA)
Linux Linuxe33921271d4438f4a24014f560e5ab297d7eda3fVendor (CNA)
Linux Linuxeb7a0ba650d607976d1a0a5e7501d3f14b35d026Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.06.6.161.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.12.115-2 · Debian:13Package 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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 7, 2026+10 d
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.

No nightly-computed relations.

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

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.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records