Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2023-52480

Disclosure Date: February 29, 2024
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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.

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CVSS V3 Severity and Metrics
Base Score:
7.0 High
Impact Score:
5.9
Exploitability Score:
1
Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
High
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Technical Analysis