CVE-2026-93203 Linux kernel batman-adv - Data Tampering

Linux kernel batman-adv contains a CRC corruption vulnerability caused by parallel claim add operations in batadv_bla_add_claim(), letting attackers cause incorrect CRC calculations in backbone claims, exploit requires concurrent claim processing.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.33% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Data Tampering
Impact
Data Tampering
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for batman-adv CRC corruption.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs