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NVD / CVE Program· CNA Linux

CVE-2026-90341: firmware: coreboot: Validate table bounds

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.19% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2d98a3b89394f283f054a4a54587c14ee89acaf9, 3cca0d6dd4c2636d2514234233cb02db76621607, 88027241c1d2c3213bac937a1c2cb89a5775a413.

Low priority for now. Upgrade to Linux Linux 2d98a3b89394f283f054a4a54587c14ee89acaf9, 3cca0d6dd4c2636d2514234233cb02db76621607, 88027241c1d2c3213bac937a1c2cb89a5775a413 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: firmware: coreboot: Validate table bounds The existing coreboot_table_populate() bounds checks limit individual entries to the mapped length. However, coreboot_table_probe() replaces the platform resource length with header and table sizes supplied by firmware before mapping the full table. A malformed table can overflow the 32-bit size addition or advertise an extent beyond the resource, causing the driver to map and parse memory outside the resource. A resource shorter than the fixed header is also mapped as though it contained a complete header. Reject resources shorter than the fixed header. After validating the signature, require a complete header, calculate the advertised extent with overflow checking, and reject extents beyond the resource before remapping the table.

HighCVSS 7.7 · v3.1—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.7
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-2026-90341

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

    • 4.12affected
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before 3cca0d6dd4c2636d2514234233cb02db76621607affected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before f79f621215a0944c4a0e1b3b86b99e433ae8c527affected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before d848fac90c6f0566e7b93066b0b86024f65f395eaffected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before 88027241c1d2c3213bac937a1c2cb89a5775a413affected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before fd93859ecfa5b6495a6863c18fd923a7666def26affected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before 2d98a3b89394f283f054a4a54587c14ee89acaf9affected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before e82f260a74dea8cdd7857f2cc66f73d0da522bb3affected · git
    • d384d6f43d1ec3f1225ab0275fd592c5980bd830 and later · before a58a57a1076f8c5dae0327e3710899478c3be901affected · git
    • before 4.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-90339Sep 17, 2026 · powerpc/syscall: Fix syscall skip handling for seccomp and ptrace
    0Monitor
  • ← EarlierCVE-2026-90340Sep 17, 2026 · pinctrl: generic: free maps on pinctrl_generic_to_map() failure
    0Monitor
  • Later →CVE-2026-90342Sep 17, 2026 · bpf: Fix mmap_lock deadlock on arena lock failure
    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 Linux2d98a3b89394f283f054a4a54587c14ee89acaf9Vendor (CNA)
Linux Linux3cca0d6dd4c2636d2514234233cb02db76621607Vendor (CNA)
Linux Linux88027241c1d2c3213bac937a1c2cb89a5775a413Vendor (CNA)
Linux Linuxa58a57a1076f8c5dae0327e3710899478c3be901Vendor (CNA)
Linux Linuxd848fac90c6f0566e7b93066b0b86024f65f395eVendor (CNA)
Linux Linuxe82f260a74dea8cdd7857f2cc66f73d0da522bb3Vendor (CNA)
Linux Linuxf79f621215a0944c4a0e1b3b86b99e433ae8c527Vendor (CNA)
Linux Linuxfd93859ecfa5b6495a6863c18fd923a7666def26Vendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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.

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).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

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