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NVD / CVE Program· CNA Linux

CVE-2026-46231: batman-adv: bla: put backbone reference on failed claim hash insert

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: 0.11% (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 0baf4b659cdc7305cf685b5a5d60f9e3816ab5d0, 2888c9a154123db0254ae4fb9bea570c7e1f2e06, 3.17; 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 0baf4b659cdc7305cf685b5a5d60f9e3816ab5d0, 2888c9a154123db0254ae4fb9bea570c7e1f2e06, 3.17; 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: bla: put backbone reference on failed claim hash insert When batadv_bla_add_claim() fails to insert a new claim into the hash, it leaked a reference to the backbone_gw for which the claim was intended. Call batadv_backbone_gw_put() on the error path to release the reference and avoid leaking the backbone_gw object.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 28, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 1th 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%

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-2026-46231

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 kernel3.16.39 and later · before 3.17
  • linux linux kernel4.4.217 and later · before 4.5
  • linux linux kernel4.7.1 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 kernel4.7
  • 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

    • 3fdd337ac0b277a1f40aa73b35283520f426e517, 485eedfabc2aefac8f09f98a82ba1c1e3e202a6d, 4.7affected
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before 6c8b68a7ed667a63aa603ba4d3a7088be143007eaffected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before 769f413d374ff2b6ff6d8d8c37b4c1178e6cdf14affected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before 2888c9a154123db0254ae4fb9bea570c7e1f2e06affected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before 65419eb4259a26a3cd3f56fa0e3b3c113bf8c256affected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before fd0ca034c1e71ca7613cde9dd892836b2c2831bdaffected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before 0baf4b659cdc7305cf685b5a5d60f9e3816ab5d0affected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before 7cccf4eb4f96d3c3af91a00b7a9caa652439542eaffected · git
    • 3db0decf1185357d6ab2256d0dede1ca9efda03d and later · before ba9d20ee9076dac32c371116bacbe72480eb356caffected · git
    • 3.16.39 and later · before 3.17affected · 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 6.12.90-16.12.90-1
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-2026-46223May 28, 2026 · cgroup: Defer css percpu_ref kill on rmdir until cgroup is depopulated
    22Monitor
  • ← EarlierCVE-2026-46224May 28, 2026 · drm/xe: Fix bo leak in xe_dma_buf_init_obj() on allocation failure
    22Monitor
  • Later →CVE-2026-46232May 28, 2026 · HID: playstation: Clamp num_touch_reports
    32Monitor

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 Linux0baf4b659cdc7305cf685b5a5d60f9e3816ab5d0Vendor (CNA)
Linux Linux2888c9a154123db0254ae4fb9bea570c7e1f2e06Vendor (CNA)
Linux Linux3.17Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux65419eb4259a26a3cd3f56fa0e3b3c113bf8c256Vendor (CNA)
Linux Linux6c8b68a7ed667a63aa603ba4d3a7088be143007eVendor (CNA)
Linux Linux769f413d374ff2b6ff6d8d8c37b4c1178e6cdf14Vendor (CNA)
Linux Linux7cccf4eb4f96d3c3af91a00b7a9caa652439542eVendor (CNA)
Linux Linuxba9d20ee9076dac32c371116bacbe72480eb356cVendor (CNA)
Linux Linuxfd0ca034c1e71ca7613cde9dd892836b2c2831bdVendor (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.

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).

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

  • 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