CVE-2026-93125 Linux Kernel - Integer Overflow

Linux kernel contains an integer overflow vulnerability in BPF kfunc argument handling where rdonly_buf_size or rdwr_buf_size exceeding u32 max are not properly rejected, letting attackers cause incorrect memory size validation, exploit requires use of specific kfunc arguments.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

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

Vendor fix

Update to the latest Linux kernel version containing the fix that rejects rdonly_buf_size/rdwr_buf_size values exceeding U32_MAX.

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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