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

CVE-2024-50152

Disclosure Date: November 07, 2024
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix possible double free in smb2_set_ea()

Clang static checker(scan-build) warning:
fs/smb/client/smb2ops.c:1304:2: Attempt to free released memory.
1304 | kfree(ea);

  |         ^~~~~~~~~

There is a double free in such case:
‘ea is initialized to NULL’ –> ‘first successful memory allocation for
ea’ –> ‘something failed, goto sea_exit’ –> ‘first memory release for ea’
–> ‘goto replay_again’ –> ‘second goto sea_exit before allocate memory
for ea’ –> ‘second memory release for ea resulted in double free’.

Re-initialie ‘ea’ to NULL near to the replay_again label, it can fix this
double free problem.

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CVSS V3 Severity and Metrics
Base Score:
5.5 Medium
Impact Score:
3.6
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Vendors

Weaknesses

Additional Info

Technical Analysis