What is CVE-2026-23226?

CVE-2026-23226 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 8.8/10. Published 2026-02-18.

How severe is CVE-2026-23226?

High severity. CVSS v3 base score is 8.8 out of 10.

Use After Free in Linux

CVE-2026-23226

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.

Vulnerability class: Use-After-Free

EPSS: 0.004 (34.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 7.0, 1d9c4172110e645b383ff13eee759728d74f1a5d, 6.19.1
Linux Linux_kernel

Weakness classification (CWE)

CWE-416 — Use After Free

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-23226?: CVE-2026-23226 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 8.8/10. Published 2026-02-18.
How severe is CVE-2026-23226?: High severity. CVSS v3 base score is 8.8 out of 10.