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NVD / CVE Program· CNA Linux

CVE-2026-72231: batman-adv: tt: avoid request storms during pending request

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: 0.67% (FIRST EPSS); higher than 52.6% 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 067e413eec2e63c2996909ef55214b3a0eda0be7, 21c44a6895f41df811d1c91d10eea194dda2b345, 27c7d40008231ae4140d35501b60087a9de2d2c3.

Low priority for now. Upgrade to Linux Linux 067e413eec2e63c2996909ef55214b3a0eda0be7, 21c44a6895f41df811d1c91d10eea194dda2b345, 27c7d40008231ae4140d35501b60087a9de2d2c3 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: tt: avoid request storms during pending request batadv_send_tt_request() allocates a tt_req_node when none exists for the destination originator node. This should prevent that a multiple TT requests are send at the same time to an originator. But if allocation of the send buffer failed, this request must be cleaned up again. But indicator for such a failure is "ret == false". But the actual implementation is checking for "ret == true". The check must be inverted to not loose the information about the TT request directly after it was attempted to be sent out. This should avoid potential request storms.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.6% · 52th 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 · 0.6%

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-2026-72231

When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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

    • 3.13affected
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 6055695ea40c64a47e00742c12c99b1a33b4daedaffected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 21c44a6895f41df811d1c91d10eea194dda2b345affected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 5e46c76d9a5062212c4c5f642a5549fd9c057f8aaffected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 067e413eec2e63c2996909ef55214b3a0eda0be7affected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 716f434eb35869e130424331584a91fbb729b9bdaffected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 6a65ac8a81e903bb4b555c1d13532f5cb0167a4aaffected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before aba1cf21954e64c36afb966b754adad2b0b8aa48affected · git
    • 335fbe0f5d2501b7dd815806aef6fd9bad784eb1 and later · before 27c7d40008231ae4140d35501b60087a9de2d2c3affected · git
    • before 3.13not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
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-2026-72229Aug 15, 2026 · batman-adv: clean untagged VLAN on netdev registration failure
    0Monitor
  • ← EarlierCVE-2026-72230Aug 15, 2026 · batman-adv: frag: free unfragmentable packet
    0Monitor
  • Later →CVE-2026-72232Aug 15, 2026 · batman-adv: ensure minimal ethernet header on TX
    31Monitor

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 Linux067e413eec2e63c2996909ef55214b3a0eda0be7Vendor (CNA)
Linux Linux21c44a6895f41df811d1c91d10eea194dda2b345Vendor (CNA)
Linux Linux27c7d40008231ae4140d35501b60087a9de2d2c3Vendor (CNA)
Linux Linux5e46c76d9a5062212c4c5f642a5549fd9c057f8aVendor (CNA)
Linux Linux6055695ea40c64a47e00742c12c99b1a33b4daedVendor (CNA)
Linux Linux6a65ac8a81e903bb4b555c1d13532f5cb0167a4aVendor (CNA)
Linux Linux716f434eb35869e130424331584a91fbb729b9bdVendor (CNA)
Linux Linuxaba1cf21954e64c36afb966b754adad2b0b8aa48Vendor (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

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

  • 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