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NVD / CVE Program· CNA Linux

CVE-2026-80706: can: softing: fw_parse(): validate firmware record spans

HighCVSS 7.8 · v3.1—No exploit Fix available

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: 0.12% (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 2ee477e541a6d5e434d6a4041c6b677ab42e1d82, 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1, 84c850b08fc0d671c245144b619683129b55690a; 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 2ee477e541a6d5e434d6a4041c6b677ab42e1d82, 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1, 84c850b08fc0d671c245144b619683129b55690a; 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: can: softing: fw_parse(): validate firmware record spans fw_parse() reads a fixed record header, a firmware-provided payload, and a trailing checksum without knowing the end of the firmware blob. A truncated record can therefore make those reads exceed the blob. The same record also supplies addresses and lengths for writes into DPRAM. The generic loader uses wrap-prone mixed signed arithmetic for its bounds check, while the application loader does not bound the staging copy at all. Pass the firmware end to the parser and validate the full source record. Use a signed wide offset for generic DPRAM records and validate the application staging span against the mapped DPRAM before copying.

Published
Aug 28, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 1th percentile
CWE
—

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-2026-80706

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

    • 2.6.38affected
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before f6d9a6a9512430b395a1940d7b216394fd02d30baffected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before 84c850b08fc0d671c245144b619683129b55690aaffected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before d0eac0ea7cf493e787fd7b4a556e43ef03cb4b50affected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before ae588e5b9cc268de1aabf30f939f0870717ca164affected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before ad331e26fd213a19fee0de18cdacd67b7ff5b478affected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before 2ee477e541a6d5e434d6a4041c6b677ab42e1d82affected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before 808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1affected · git
    • 03fd3cf5a179da12e6bee5e9d74b648aff68dc4c and later · before 856d6cb04e5407523566b075841dcd6423757d1caffected · git
    • before 2.6.38not 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 7.1.8-17.1.8-1

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-2026-80704Aug 28, 2026 · drm/amd/display: use proper context for logging
    0Monitor
  • ← EarlierCVE-2026-80705Aug 28, 2026 · drm/amd/display: check if dml21_add_phantom_plane() is successful
    0Monitor
  • Later →CVE-2026-80707Aug 28, 2026 · can: j1939: transport: j1939_session_fresh_new(): initialize receive 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 Linux2ee477e541a6d5e434d6a4041c6b677ab42e1d82Vendor (CNA)
Linux Linux808ed899dcf8bdef66894fda5eb7ee4bb0eb8dc1Vendor (CNA)
Linux Linux84c850b08fc0d671c245144b619683129b55690aVendor (CNA)
Linux Linux856d6cb04e5407523566b075841dcd6423757d1cVendor (CNA)
Linux Linuxad331e26fd213a19fee0de18cdacd67b7ff5b478Vendor (CNA)
Linux Linuxae588e5b9cc268de1aabf30f939f0870717ca164Vendor (CNA)
Linux Linuxd0eac0ea7cf493e787fd7b4a556e43ef03cb4b50Vendor (CNA)
Linux Linuxf6d9a6a9512430b395a1940d7b216394fd02d30bVendor (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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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)

—

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.

References

Show all references (7 more)

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

All records