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CVE-2026-43382· NVD / CVE Program· CNA Linux

batman-adv: Avoid double-rtnl_lock ELP metric worker

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 192f40ad8a7dac58dae9199a065dbf7e6e67b75b, 2ab9f2531d37775cd79228c1f5d80e6bd08d11d3, 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 192f40ad8a7dac58dae9199a065dbf7e6e67b75b, 2ab9f2531d37775cd79228c1f5d80e6bd08d11d3, 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b 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: Avoid double-rtnl_lock ELP metric worker batadv_v_elp_get_throughput() might be called when the RTNL lock is already held. This could be problematic when the work queue item is cancelled via cancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case, an rtnl_lock() would cause a deadlock. To avoid this, rtnl_trylock() was used in this function to skip the retrieval of the ethtool information in case the RTNL lock was already held. But for cfg80211 interfaces, batadv_get_real_netdev() was called - which also uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must also be used instead and the lockless version __batadv_get_real_netdev() has to be called.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 8, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th 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

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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 kernel5.4.291 and later · before 5.5
  • linux linux kernel5.10.235 and later · before 5.10.253
  • linux linux kernel5.15.179 and later · before 5.15.203
  • linux linux kernel6.1.129 and later · before 6.1.167
  • linux linux kernel6.6.79 and later · before 6.6.130
  • linux linux kernel6.12.16 and later · before 6.12.78
  • linux linux kernel6.13.4 and later · before 6.14
  • linux linux kernel6.14.1 and later · before 6.18.19
  • linux linux kernel6.19 and later · before 6.19.9
  • linux linux kernel6.14
  • linux linux kernel7.0

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

    • 1c334629176c2d644befc31a20d4bf75542f7631, af264c2a9adc37f4bdf88ca7f3affa15d8c7de9e, 6.14affected
    • a0019971f340ae02ba54cf1861f72da7e03e6b66 and later · before 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9baffected · git
    • 3c0e0aecb78cb2a2ca1dc701982d08fedb088dc6 and later · before 192f40ad8a7dac58dae9199a065dbf7e6e67b75baffected · git
    • 781a06fd265a8151f7601122d9c2e985663828ff and later · before fa7b4edfbabdf9235b0ab4bea297fc12b3bec9caaffected · git
    • a7aa2317285806640c844acd4cd2cd768e395264 and later · before f3ca45673dab0514a887231de6f3243a699d5bfdaffected · git
    • 0fdc3c166ac17b26014313fa2b93696354511b24 and later · before b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77affected · git
    • 8c8ecc98f5c65947b0070a24bac11e12e47cc65d and later · before 2ab9f2531d37775cd79228c1f5d80e6bd08d11d3affected · git
    • 8c8ecc98f5c65947b0070a24bac11e12e47cc65d and later · before 77808fe7d03ad0062840b95f431869a8b3d88b24affected · git
    • 8c8ecc98f5c65947b0070a24bac11e12e47cc65d and later · before cfc83a3c71517b59c1047db57da31e26a9dc2f33affected · git
    • 5.10.235 and later · before 5.10.253affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.10-16.19.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-43380May 8, 2026 · hwmon: (pmbus/q54sj108a2) fix stack overflow in debugfs read
    28Monitor
  • ← EarlierCVE-2026-43381May 8, 2026 · nouveau/dpcd: return EBUSY for aux xfer if the device is asleep
    22Monitor
  • Later →CVE-2026-43384May 8, 2026 · net/tcp-ao: Fix MAC comparison to be constant-time
    39Monitor

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 Linux192f40ad8a7dac58dae9199a065dbf7e6e67b75bVendor (CNA)
Linux Linux2ab9f2531d37775cd79228c1f5d80e6bd08d11d3Vendor (CNA)
Linux Linux4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9bVendor (CNA)
Linux Linux5.10.253Vendor (CNA)
Linux Linux5.15.203Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux6.1.167Vendor (CNA)
Linux Linux6.12.78Vendor (CNA)
Linux Linux6.14Vendor (CNA)
Linux Linux6.6.130Vendor (CNA)
Linux Linux77808fe7d03ad0062840b95f431869a8b3d88b24Vendor (CNA)
Linux Linuxb7e5d8ddfdf1d6e9e0808d1adf7736a107372d77Vendor (CNA)
Linux Linuxcfc83a3c71517b59c1047db57da31e26a9dc2f33Vendor (CNA)
Linux Linuxf3ca45673dab0514a887231de6f3243a699d5bfdVendor (CNA)
Linux Linuxfa7b4edfbabdf9235b0ab4bea297fc12b3bec9caVendor (CNA)
debian:linux6.1.170-1 · 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).

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)

CWE-667 · Improper Locking

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.

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