Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Linux Linux — ksmbd: fix race condition between session lookup and expire
AV AC PR UI S C I A CVSS EPSS %ile KEV
L H L N U H H H 7.0 .0049 39.9 —
AFFECTED
Product Versions Fixed
Linux a6a9601ba995d0fec635324cb9fd8d14f9bea14e – —
Linux 6.4 – 6.1.57
TIMELINE
Feb 20 Reserved by Linux
Feb 29 Published (CNA: Linux)
Aug 15 RESCORED — CVE-2023-52480 (Linux). CVSS 9.8 → 7 (NVD).
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix race condition between session lookup and expire
Thread A + Thread B
ksmbd_session_lookup | smb2_sess_setup
sess = xa_load |
|
| xa_erase(&conn->sessions, sess->id);
|
| ksmbd_session_destroy(sess) --> kfree(sess)
|
// UAF! |
sess->last_active = jiffies |
+
This patch add rwsem to fix race condition between ksmbd_session_lookup
and ksmbd_expire_session.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| February 20, 2024 | Reserved | Reserved by Linux |
| February 29, 2024 | Published | Published (CNA: Linux) |
| August 15, 2026 | RESCORED | RESCORED — CVE-2023-52480 (Linux). CVSS 9.8 → 7 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | a6a9601ba995d0fec635324cb9fd8d14f9bea14e | — |
| Linux | Linux | — | 6.4 | 6.1.57 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-52480 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.