CVE-2026-89583 Linux Kernel - Out-of-Bounds Read

Linux kernel contains an out-of-bounds read in Bluetooth eir_get_service_data() caused by incorrect length calculation in advertising data parsing, letting attackers cause memory disclosure via ISO broadcast sink, exploit requires crafted periodic advertising reports.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for eir_get_service_data()

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

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