# CVE-2023-52480: linux: In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix race condition between session lookup...

CVE-2023-52480 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52480, released February 29, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-52480
- Priority: High
- CVSS: 7.0 (high)
- EPSS: 0.0049
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 29, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.64-1 | [DEBIAN-CVE-2023-52480](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52480.md) | Feb 29, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.5.8-1 | [DEBIAN-CVE-2023-52480](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52480.md) | Feb 29, 2024 |
| Linux | linux Debian 14 | 6.5.8-1 | [DEBIAN-CVE-2023-52480](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52480.md) | Feb 29, 2024 |

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