CVE-2024-50152

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

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: smb: cliente: se corrige una posible doble liberación en smb2_set_ea() Advertencia del comprobador estático de Clang (scan-build): fs/smb/client/smb2ops.c:1304:2: Intento de liberar memoria liberada. 1304 | kfree(ea); | ^~~~~~~~~ Hay una doble liberación en tal caso: 'ea se inicializa a NULL' -> 'primera asignación de memoria exitosa para ea' -> 'algo falló, goto sea_exit' -> 'primera liberación de memoria para ea' -> 'goto replay_again' -> 'segundo goto sea_exit antes de asignar memoria para ea' -> 'la segunda liberación de memoria para ea resultó en una doble liberación'. Reinicialice 'ea' a NULL cerca de la etiqueta replay_again, puede solucionar este problema de doble liberación.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2024-10-21 CVE Reserved
2024-11-07 CVE Published
2024-11-07 CVE Updated
---------- EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/433042a91f9373241307725b52de573933ffedbf	Vuln. Introduced
https://git.kernel.org/stable/c/4f1fffa2376922f3d1d506e49c0fd445b023a28e	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/b1813c220b76f60b1727984794377c4aa849d4c1	2024-11-01
https://git.kernel.org/stable/c/c9f758ecf2562dfdd4adf12c22921b5de8366123	2024-11-01
https://git.kernel.org/stable/c/19ebc1e6cab334a8193398d4152deb76019b5d34	2024-10-16

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.6.32 < 6.6.59 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.32 < 6.6.59"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.8 < 6.11.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.8 < 6.11.6"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.8 < 6.12-rc4 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.8 < 6.12-rc4"		en		Affected