CVE-2024-27394

tcp: Fix Use-After-Free in tcp_ao_connect_init

Severity Score

8.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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

tcp: Fix Use-After-Free in tcp_ao_connect_init

Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal
of tcp_ao_connect_init, is not part of the RCU read critical section, it
is possible that the RCU grace period will pass during the traversal and
the key will be free.

To prevent this, it should be changed to hlist_for_each_entry_safe.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: Fix Use-After-Free en tcp_ao_connect_init Dado que call_rcu, que se llama en el recorrido hlist_for_each_entry_rcu de tcp_ao_connect_init, no forma parte de la sección crítica de lectura de RCU, es posible que el El período de gracia de RCU transcurrirá durante el recorrido y la clave quedará gratuita. Para evitar esto, se debe cambiar a hlist_for_each_entry_safe.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

Poc

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2024-02-25 CVE Reserved
2024-05-09 CVE Published
2024-05-10 EPSS Updated
2024-09-10 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (3)

URL	Tag	Source
https://git.kernel.org/stable/c/7c2ffaf21bd67f73d21560995ce17eaf5fc1d37f	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/ca4fb6c6764b3f75b4f5aa81db1536291897ff7f	2024-05-02
https://git.kernel.org/stable/c/80e679b352c3ce5158f3f778cfb77eb767e586fb	2024-04-24

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"				>= 6.7 < 6.8.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.8.9"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.7 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.9"		en		Affected