CVE-2026-23226

Public on 2026-02-18

Modified on 2026-03-07

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

Severity

Important

See what this means

CVSS v3 Base Score

7.8

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	kernel	Not Affected
Amazon Linux 2 - Kernel-5.10 Extra	kernel	Not Affected
Amazon Linux 2 - Kernel-5.15 Extra	kernel	Not Affected
Amazon Linux 2 - Kernel-5.4 Extra	kernel	Not Affected
Amazon Linux 2023	kernel	Not Affected
Amazon Linux 2023	kernel6.12	Not Affected

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	CVSSv3	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-23226 Mitre: CVE-2026-23226