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NVD / CVE Program· CNA Linux

CVE-2023-53314: fbdev/ep93xx-fb: Do not assign to struct fb_info.dev

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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).
  • 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 0517fc5a71333b315164736bbd32608894fbb872, 1c6ff2a7c593db851f23e31ace2baf557ea9d0ff, 309c27162afea79b3c7f8747bb650faf6923b639.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 0517fc5a71333b315164736bbd32608894fbb872, 1c6ff2a7c593db851f23e31ace2baf557ea9d0ff, 309c27162afea79b3c7f8747bb650faf6923b639 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: fbdev/ep93xx-fb: Do not assign to struct fb_info.dev Do not assing the Linux device to struct fb_info.dev. The call to register_framebuffer() initializes the field to the fbdev device. Drivers should not override its value. Fixes a bug where the driver incorrectly decreases the hardware device's reference counter and leaks the fbdev device. v2: * add Fixes tag (Dan)

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 16, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
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.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

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

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-2023-53314

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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.32 and later · before 4.14.326
  • linux linux kernel4.15 and later · before 4.19.295
  • linux linux kernel4.20 and later · before 5.4.257
  • linux linux kernel5.5 and later · before 5.10.195
  • linux linux kernel5.11 and later · before 5.15.132
  • linux linux kernel5.16 and later · before 6.1.54
  • linux linux kernel6.2 and later · before 6.5.4

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

    • 2.6.32affected
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before ffdf2b020db717853167391a3a8d912e13428fa6affected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before 1c6ff2a7c593db851f23e31ace2baf557ea9d0ffaffected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before 8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972affected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before 4aade6c9100a3537788b6a9c7ac481037d19efdfaffected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before 309c27162afea79b3c7f8747bb650faf6923b639affected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before f83c1b13f8154e0284448912756d0a351a1a602aaffected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before 0517fc5a71333b315164736bbd32608894fbb872affected · git
    • 88017bda96a5fd568a982b01546c8fb1782dda62 and later · before f90a0e5265b60cdd3c77990e8105f79aa2fac994affected · git
    • before 2.6.32not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.55-16.1.55-1
Debian:13linuxbefore 6.5.6-16.5.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-53312Sep 16, 2025 · net: fix net_dev_start_xmit trace event vs skb_transport_offset()
    22Monitor
  • ← EarlierCVE-2023-53313Sep 16, 2025 · md/raid10: fix wrong setting of max_corr_read_errors
    22Monitor
  • Later →CVE-2023-53315Sep 16, 2025 · wifi: ath11k: Fix SKB corruption in REO destination ring
    22Monitor

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 Linux0517fc5a71333b315164736bbd32608894fbb872Vendor (CNA)
Linux Linux1c6ff2a7c593db851f23e31ace2baf557ea9d0ffVendor (CNA)
Linux Linux309c27162afea79b3c7f8747bb650faf6923b639Vendor (CNA)
Linux Linux4aade6c9100a3537788b6a9c7ac481037d19efdfVendor (CNA)
Linux Linux8ffa40ff64aa43a9a28fcf209b48d86a3e0f4972Vendor (CNA)
Linux Linuxf83c1b13f8154e0284448912756d0a351a1a602aVendor (CNA)
Linux Linuxf90a0e5265b60cdd3c77990e8105f79aa2fac994Vendor (CNA)
Linux Linuxffdf2b020db717853167391a3a8d912e13428fa6Vendor (CNA)
debian:linux6.1.55-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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