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NVD / CVE Program· CNA Linux

CVE-2026-74424: fbcon: fix NULL pointer dereference for a console without vc_data

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: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 5fae9a928482d4845bca169a3a098789203a1ca4, 6617df8c246311c82cebf061a4cee55b9df60922, 8e9b8b008f4036df0318870c5d754134ff1b94cc.

Low priority for now. Upgrade to Linux Linux 5fae9a928482d4845bca169a3a098789203a1ca4, 6617df8c246311c82cebf061a4cee55b9df60922, 8e9b8b008f4036df0318870c5d754134ff1b94cc 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: fbcon: fix NULL pointer dereference for a console without vc_data fbcon_new_modelist() runs when a framebuffer's modelist changes. For each console mapped to it with fb_display[i].mode set, it reads vc_cons[i].d and passes the vc_num to fbcon_set_disp(). This assumes a console with a mode set has a vc_data, but it can be NULL. fbcon_set_disp() sets fb_display[i].mode before it checks vc_data, and fbcon_deinit() leaves the mode set after the vc_data is freed. fbcon_new_modelist() then dereferences the NULL vc_data. Keep fb_display[i].mode set only while the console has a vc_data. Check vc_data before setting the mode in fbcon_set_disp(), and clear the mode in fbcon_deinit(). The existing mode check in fbcon_new_modelist() then skips such consoles.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 5th 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%

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

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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

    • 2.6.23affected
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before 8e9b8b008f4036df0318870c5d754134ff1b94ccaffected · git
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before cc4382dc5134826a3936a6b08de17f7dc7abe232affected · git
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before 9b783b7e03dc78ec102edf618259a2b55911fc6aaffected · git
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before ac970358c5ca0775841bd2a56ce15dc464b99003affected · git
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before 6617df8c246311c82cebf061a4cee55b9df60922affected · git
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before b134ad2f7c06b3c1098dcc95008e2045ff4b49b2affected · git
    • d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e and later · before 5fae9a928482d4845bca169a3a098789203a1ca4affected · git
    • before 2.6.23not affected · semver
    • 5.15.212 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 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-74416Aug 15, 2026 · drm/radeon: fix memory leak in radeon_ring_restore() on lock failure
    0Monitor
  • ← EarlierCVE-2026-74417Aug 15, 2026 · drm/radeon: fix integer overflow in radeon_align_pitch()
    31Monitor
  • Later →CVE-2026-74427Aug 15, 2026 · afs: Fix netns teardown to cancel the preallocation charger
    39Monitor

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 Linux5fae9a928482d4845bca169a3a098789203a1ca4Vendor (CNA)
Linux Linux6617df8c246311c82cebf061a4cee55b9df60922Vendor (CNA)
Linux Linux8e9b8b008f4036df0318870c5d754134ff1b94ccVendor (CNA)
Linux Linux9b783b7e03dc78ec102edf618259a2b55911fc6aVendor (CNA)
Linux Linuxac970358c5ca0775841bd2a56ce15dc464b99003Vendor (CNA)
Linux Linuxb134ad2f7c06b3c1098dcc95008e2045ff4b49b2Vendor (CNA)
Linux Linuxcc4382dc5134826a3936a6b08de17f7dc7abe232Vendor (CNA)
debian:linux6.1.180-1 · 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

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. 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