CVE-2026-90392 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by accessing bpf link program pointer without proper locking in bpf_link_show_fdinfo and bpf_link_get_info_by_fd, letting attackers cause memory corruption, exploit requires concurrent bpf_link_update.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Remote Code Execution
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.

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