OSV - Open Source Vulnerabilities

CVE-2026-31683

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Source
https://cve.org/CVERecord?id=CVE-2026-31683
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31683.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-31683
Downstream
Related
Published
2026-04-25T08:47:00Z
Modified
2026-08-12T03:30:31Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
batman-adv: avoid OGM aggregation when skb tailroom is insufficient
Details

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.

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31683.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
c6c8fea29769d998d94fcec9b9f14d4b52b349d3
Fixed
67176c96f325837b0bb3e9538ca2eba414f447d8
Fixed
0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1
Fixed
6755347c5f9bdd44dee80f692208b056fcd40a52
Fixed
1ada20331f2df2a942d6b83ae1f04a304b642e2a
Fixed
6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075
Fixed
0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8
Fixed
eda89a1bae0602aec8314ced299bb243b9f9aeef
Fixed
0d4aef630be9d5f9c1227d07669c26c4383b5ad0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31683.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.38
Fixed
5.10.253
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.203
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.167
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.130
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.78
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.20
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.10

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31683.json"