Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-46238: batman-adv: stop caching unowned originator pointers in BAT IV

HighCVSS 8.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 35/100)

  • 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: 0.26% (FIRST EPSS).
  • Someone on the same network segment 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 09dc0d1a12222ffca6481916eab3cfea477b9620, 384e3050a42be9085d50507b4d5f8266a588d742, 67bceeb22207f1f5a402973a3a0809e5f2698f38; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 09dc0d1a12222ffca6481916eab3cfea477b9620, 384e3050a42be9085d50507b4d5f8266a588d742, 67bceeb22207f1f5a402973a3a0809e5f2698f38; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0 6.6.141.1-1 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: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs. Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use. [sven: avoid bonding logic for outgoing OGM]

Published
May 28, 2026
Updated
Aug 5, 2026
EPSS
0.2% · 18th percentile
CWE
—

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CNA vs NVD score

NVD
—
CNA · Linux
8.8
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-2026-46238

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records
Is your version affected? Check it

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.

We use this product, ask for help

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

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
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 86b2b58d7c228d850c8c78e4144e6123e8ed2718affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 384e3050a42be9085d50507b4d5f8266a588d742affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 8c16c68fdbb69778f8d04f650340c3f4d1518f8eaffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before aafcbaf1159ea224528ca4075d0ba8c10ef374afaffected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 6e20700f8c524ac379ba8274ff5d453023b7c006affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 09dc0d1a12222ffca6481916eab3cfea477b9620affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 67bceeb22207f1f5a402973a3a0809e5f2698f38affected · git
    • c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before f03e8583532941b07761c5429de7d50766fa3110affected · git
    • before 2.6.38not affected · semver
Affected versions · NVD (8)

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

  • linux linux kernel2.6.38 and later · before 5.10.258
  • linux linux kernel5.11 and later · before 5.15.209
  • linux linux kernel5.16 and later · before 6.1.175
  • linux linux kernel6.2 and later · before 6.6.140
  • linux linux kernel6.7 and later · before 6.12.90
  • linux linux kernel6.13 and later · before 6.18.32
  • linux linux kernel6.19 and later · before 7.0.9
  • linux linux kernel7.1

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.90-16.12.90-1
Debian:14linuxbefore 7.0.9-17.0.9-1

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-2026-46233May 28, 2026 · batman-adv: bla: only purge non-released claims
    22Monitor
  • ← EarlierCVE-2026-46236May 28, 2026 · media: rc: xbox_remote: heed DMA restrictions
    22Monitor
  • Later →CVE-2026-46239May 28, 2026 · media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl
    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 Linux09dc0d1a12222ffca6481916eab3cfea477b9620Vendor (CNA)
Linux Linux384e3050a42be9085d50507b4d5f8266a588d742Vendor (CNA)
Linux Linux67bceeb22207f1f5a402973a3a0809e5f2698f38Vendor (CNA)
Linux Linux6e20700f8c524ac379ba8274ff5d453023b7c006Vendor (CNA)
Linux Linux86b2b58d7c228d850c8c78e4144e6123e8ed2718Vendor (CNA)
Linux Linux8c16c68fdbb69778f8d04f650340c3f4d1518f8eVendor (CNA)
Linux Linuxaafcbaf1159ea224528ca4075d0ba8c10ef374afVendor (CNA)
Linux Linuxf03e8583532941b07761c5429de7d50766fa3110Vendor (CNA)
azl3 kernel 6.6.139.1-1 on Azure Linux 3.06.6.141.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · 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.

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: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment 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
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/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