CVE-2026-93204

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Source
https://cve.org/CVERecord?id=CVE-2026-93204
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93204.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-93204
Downstream
Published
2026-09-17T16:12:24Z
Modified
2026-09-18T03:46:16Z
Summary
batman-adv: dat: atomically update mac addresses
Details

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: dat: atomically update mac addresses

When a MAC address is updated in batadv_dat_entry_add(), it is done using a simple copy function. A parallel reader might only see parts of this update. In worst case, the reader is transporting the half updated MAC address over the network or is creating an ARP response using it - poisoning the ARP cache.

atomic64_t can be used to store the 48 bit of a mac address. A reader will then either see the old mac address or the new one - never a mixture of both.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93204.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
2f1dfbe185075a50dc8f0490a136377af53a1c62
Fixed
159360a0de831845c4500b4f8638decdcd624040
Fixed
259db2c04586d40b82c5c3002b1e28b0698a0bb7
Fixed
1674855a5b6eacfe35f4db3095d7055c25467274
Fixed
66238e2a74eca5dabf85b0cd2c3c944e474dc2fd
Fixed
a5e4d6cb4f6848b8906c1c493f99a8ccc0638515
Fixed
f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9
Fixed
e6de568d3eda3e3c01c868fabd7a9535d5ee4a73

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93204.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.8.0
Fixed
5.15.221
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.188
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.157
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.110
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.52
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.2.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93204.json"