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NVD / CVE Program· CNA Linux

CVE-2026-80646: ipv6: guard against possible NULL deref in __in6_dev_stats_get()

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: 0.71% (FIRST EPSS); higher than 53.5% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 0db1949084e85a72d174a7dea3259b94fe5a9305, 1a4adfbeb47a212a64539137411f1ca168474d33, 1e3db30a88815bae6e9d5db6f64ac735e615a07e.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0db1949084e85a72d174a7dea3259b94fe5a9305, 1a4adfbeb47a212a64539137411f1ca168474d33, 1e3db30a88815bae6e9d5db6f64ac735e615a07e 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: ipv6: guard against possible NULL deref in __in6_dev_stats_get() dev_get_by_index_rcu() could return NULL if the original physical device is unregistered. Found by Sashiko.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Aug 28, 2026
Updated
Oct 16, 2026
EPSS
0.7% · 53th percentile
CWE
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.5
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-2026-80646

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

    • a24963500a4ec921ce9c2597e0a584e44513afae, 5.2affected
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before a23f2c68c6635e41404f189f8f7ae910738cebdbaffected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before e14db43677946bf2095febd294bb3c13ab375ab7affected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before 1a4adfbeb47a212a64539137411f1ca168474d33affected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before 1e3db30a88815bae6e9d5db6f64ac735e615a07eaffected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before 952426a83ca75cea25c09d58944abafaa3ebd242affected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before 0db1949084e85a72d174a7dea3259b94fe5a9305affected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before fc920c0659cdea5afd8721c1155a51564859e075affected · git
    • e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f and later · before 507541c2a8eeb76c02bd2511958f73a8cfa3e1bcaffected · git
    • 4.19.291 and later · before 4.20affected · 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-2026-80637Aug 28, 2026 · netfilter: synproxy: fix unaligned memory access in timestamp adjustment
    30Monitor
  • ← EarlierCVE-2026-80643Aug 28, 2026 · EDAC/igen6: Fix call trace due to missing release()
    0Monitor
  • Later →CVE-2026-80650Aug 28, 2026 · media: atomisp: gc2235: fix UAF and memory leak
    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 Linux0db1949084e85a72d174a7dea3259b94fe5a9305Vendor (CNA)
Linux Linux1a4adfbeb47a212a64539137411f1ca168474d33Vendor (CNA)
Linux Linux1e3db30a88815bae6e9d5db6f64ac735e615a07eVendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux507541c2a8eeb76c02bd2511958f73a8cfa3e1bcVendor (CNA)
Linux Linux952426a83ca75cea25c09d58944abafaa3ebd242Vendor (CNA)
Linux Linuxa23f2c68c6635e41404f189f8f7ae910738cebdbVendor (CNA)
Linux Linuxe14db43677946bf2095febd294bb3c13ab375ab7Vendor (CNA)
Linux Linuxfc920c0659cdea5afd8721c1155a51564859e075Vendor (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+1% in 7 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

Attack conditions

  • Anyone who can reach it over the internet 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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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. SSVC exploitation— → 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