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NVD / CVE Program· CNA Linux

CVE-2026-64092: batman-adv: tp_meter: fix tp_vars reference leak in receiver shutdown

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: 0.12% (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 0b1bedf114ea93fef929b31f0d70a9eedcc601de, 297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae, 5.11.

Low priority for now. Upgrade to Linux Linux 0b1bedf114ea93fef929b31f0d70a9eedcc601de, 297e1bc4a915b7cd3e65a79ed906b23fb3d7aaae, 5.11 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: tp_meter: fix tp_vars reference leak in receiver shutdown The receiver shutdown timer handler, batadv_tp_receiver_shutdown(), is responsible for releasing the tp_vars reference it holds. However, the existing logic for coordinating this release with batadv_tp_stop_all() was flawed. timer_shutdown_sync() guarantees the timer will not fire again after it returns, but it returns non-zero only when the timer was pending at the time of the call. If the timer had already expired (and batadv_tp_stop_all() would unsucessfully try to rearm itself), batadv_tp_stop_all() skips its batadv_tp_vars_put(), and batadv_tp_receiver_shutdown() fails to put its own reference as well. Fix this by introducing a new atomic variable receiving that is set to 1 when the receiver is initialized and cleared atomically with atomic_xchg() by whichever side claims it first. Only the side that observes the transition from 1 to 0 is responsible for releasing the tp_vars timer reference, eliminating the uncertainty.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Aug 11, 2026
EPSS
0.1% · 2th 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

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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.

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 kernel5.10.259 and later · before 5.11
  • linux linux kernel6.6.140 and later · before 6.6.142
  • linux linux kernel6.12.90 and later · before 6.12.92
  • linux linux kernel6.18.32 and later · before 6.18.34
  • linux linux kernel7.0.9 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

    • 5e7d0ac936354c36810e74ac3056b334ed1f4058affected
    • 268078acae72daa12b17b2b299701cb9924e469a and later · before 7715c73f33260af724d734c41b794457e9be8dbcaffected · git
    • 58943b7ea356294749dae3e75b96c0ee292c00be and later · before 297e1bc4a915b7cd3e65a79ed906b23fb3d7aaaeaffected · git
    • 79bc0eaeef2c5797317bf2da8e3159a74d62ec47 and later · before 0b1bedf114ea93fef929b31f0d70a9eedcc601deaffected · git
    • 26dfeee8db81354bfdade155f27f9e16510ad196 and later · before a9f0bfd624ee8a286d6fd2bf0f796e730efb49b0affected · git
    • 03660dab86f93319178a24667f6998526dc4355d and later · before b285bc0a97f43823a4967fb6d286de4c7f53d541affected · git
    • 8634c1dbd73adb74d40533ebb7e914efb82e71fb and later · before d078501dde9b57210f1808cdef4b59463d1f5fc8affected · git
    • 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166 and later · before 77098e4bea37af51d3962efa88a5af2ea5e1ac57affected · git
    • 5.10.259 and later · before 5.11affected · semver
    • 6.6.140 and later · before 6.6.142affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
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-2026-64090Jul 19, 2026 · batman-adv: tt: avoid empty VLAN responses
    22Monitor
  • ← EarlierCVE-2026-64091Jul 19, 2026 · batman-adv: tt: fix TOCTOU race for reported vlans
    39Monitor
  • Later →CVE-2026-64093Jul 19, 2026 · batman-adv: tp_meter: directly shut down timer on cleanup
    35Monitor

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 Linux0b1bedf114ea93fef929b31f0d70a9eedcc601deVendor (CNA)
Linux Linux297e1bc4a915b7cd3e65a79ed906b23fb3d7aaaeVendor (CNA)
Linux Linux5.11Vendor (CNA)
Linux Linux6.12.92Vendor (CNA)
Linux Linux6.18.34Vendor (CNA)
Linux Linux6.6.142Vendor (CNA)
Linux Linux7.0.11Vendor (CNA)
Linux Linux77098e4bea37af51d3962efa88a5af2ea5e1ac57Vendor (CNA)
Linux Linux7715c73f33260af724d734c41b794457e9be8dbcVendor (CNA)
Linux Linuxa9f0bfd624ee8a286d6fd2bf0f796e730efb49b0Vendor (CNA)
Linux Linuxb285bc0a97f43823a4967fb6d286de4c7f53d541Vendor (CNA)
Linux Linuxd078501dde9b57210f1808cdef4b59463d1f5fc8Vendor (CNA)
debian:linux6.12.94-1 · Debian:13Package 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)

—

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 (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records