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NVD / CVE Program· CNA Linux

CVE-2026-64094: batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface

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: 0.15% (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 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45, 2a8c9e86529156c62d9187b9ed9454c31665ad33, 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70.

Low priority for now. Upgrade to Linux Linux 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45, 2a8c9e86529156c62d9187b9ed9454c31665ad33, 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70 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: bla: avoid NULL-ptr deref for claim via dropped interface Without rtnl_lock held, a hardif might be retrieved as primary interface of a meshif, but then (while operating on this interface) getting decoupled from the mesh interface. In this case, the meshif still exists but the pointer from the primary hardif to the meshif is set to NULL. The mesh_iface must be checked first to be non-NULL before continuing to send an ARP request using meshif.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Aug 11, 2026
EPSS
0.1% · 4th percentile

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%

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.

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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 kernel3.5 and later · before 5.10.259
  • linux linux kernel5.11 and later · before 5.15.210
  • linux linux kernel5.16 and later · before 6.1.176
  • linux linux kernel6.2 and later · before 6.6.143
  • linux linux kernel6.7 and later · before 6.12.93
  • linux linux kernel6.13 and later · before 6.18.34
  • linux linux kernel6.19 and later · before 7.0.11
  • linux linux kernel7.1

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

    • 3.5affected
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 53cb3511f6eda37d3bd923545fdba6013b6d7bb7affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before efb62458c94db1fe3a287e7e89c31b0cfb03f938affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 2a8c9e86529156c62d9187b9ed9454c31665ad33affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 6921a7683ae9ad0208d829e71f725a9e25ccff49affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 555b8d3f5c313d81d46274fd0976352dafc80124affected · git
    • 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24affected · git
    • before 3.5not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.12-17.0.12-1

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-2026-64092Jul 19, 2026 · batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown
    22Monitor
  • ← EarlierCVE-2026-64093Jul 19, 2026 · batman-adv: tp_meter: directly shut down timer on cleanup
    35Monitor
  • Later →CVE-2026-64095Jul 19, 2026 · batman-adv: bla: avoid double decrement of bla.num_requests
    28Monitor

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 Linux0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45Vendor (CNA)
Linux Linux2a8c9e86529156c62d9187b9ed9454c31665ad33Vendor (CNA)
Linux Linux4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70Vendor (CNA)
Linux Linux53cb3511f6eda37d3bd923545fdba6013b6d7bb7Vendor (CNA)
Linux Linux555b8d3f5c313d81d46274fd0976352dafc80124Vendor (CNA)
Linux Linux6921a7683ae9ad0208d829e71f725a9e25ccff49Vendor (CNA)
Linux Linuxefb62458c94db1fe3a287e7e89c31b0cfb03f938Vendor (CNA)
Linux Linuxf80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24Vendor (CNA)
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.

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

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)

CWE-476 · NULL Pointer Dereference

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