Linux Kernel up to 6.19.9 batman-adv packet_len allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.19.9. Affected is an unknown function of the component batman-adv. Performing a manipulation of the argument packet_len results in allocation of resources. This vulnerability is cataloged as CVE-2026-31683. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.19.9. This affects some unknown processing of the component batman-adv. The manipulation of the argument packet_len with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: batman-adv: avoid OGM aggregation when skb tailroom is insufficient When OGM aggregation state is toggled at runtime, an existing forwarded packet may have been allocated with only packet_len bytes, while a later packet can still be selected for aggregation. Appending in this case can hit skb_put overflow conditions. Reject aggregation when the target skb tailroom cannot accommodate the new packet. The caller then falls back to creating a new forward packet instead of appending.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-31683 since 03/09/2026. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 310343 (Linux Distros Unpatched Vulnerability : CVE-2026-31683), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20 or 6.19.10 eliminates this vulnerability. Applying the patch 67176c96f325837b0bb3e9538ca2eba414f447d8/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1/6755347c5f9bdd44dee80f692208b056fcd40a52/1ada20331f2df2a942d6b83ae1f04a304b642e2a/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8/eda89a1bae0602aec8314ced299bb243b9f9aeef/0d4aef630be9d5f9c1227d07669c26c4383b5ad0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (310343) and EUVD (EUVD-2026-25650). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 310343
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-31683

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.167/6.6.130/6.12.78/6.18.20/6.19.10
Patch: 67176c96f325837b0bb3e9538ca2eba414f447d8/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1/6755347c5f9bdd44dee80f692208b056fcd40a52/1ada20331f2df2a942d6b83ae1f04a304b642e2a/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8/eda89a1bae0602aec8314ced299bb243b9f9aeef/0d4aef630be9d5f9c1227d07669c26c4383b5ad0

Timelineinfo

03/09/2026 CVE reserved
04/25/2026 +46 days Advisory disclosed
04/25/2026 +0 days VulDB entry created
04/26/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31683 (🔒)
GCVE (CVE): GCVE-0-2026-31683
GCVE (VulDB): GCVE-100-359589
EUVD: 🔒

Entryinfo

Created: 04/25/2026 11:35
Updated: 04/26/2026 05:51
Changes: 04/25/2026 11:35 (59), 04/25/2026 13:02 (1), 04/26/2026 05:51 (2)
Complete: 🔍
Cache ID: 216::103

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