CVE-2024-26910

netfilter: ipset: fix performance regression in swap operation

Severity Score

4.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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

netfilter: ipset: fix performance regression in swap operation

The patch "netfilter: ipset: fix race condition between swap/destroy
and kernel side add/del/test", commit 28628fa9 fixes a race condition.
But the synchronize_rcu() added to the swap function unnecessarily slows
it down: it can safely be moved to destroy and use call_rcu() instead.

Eric Dumazet pointed out that simply calling the destroy functions as
rcu callback does not work: sets with timeout use garbage collectors
which need cancelling at destroy which can wait. Therefore the destroy
functions are split into two: cancelling garbage collectors safely at
executing the command received by netlink and moving the remaining
part only into the rcu callback.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: ipset: corrige la regresión de rendimiento en la operación de intercambio El parche "netfilter: ipset: corrige la condición de ejecución entre swap/destroy y add/del/test del lado del kernel", commit 28628fa9 corrige un condición de ejecución. Pero elsync_rcu() agregado a la función swap la ralentiza innecesariamente: se puede mover con seguridad para destruir y usar call_rcu() en su lugar. Eric Dumazet señaló que simplemente llamar a las funciones de destrucción como devolución de llamada de rcu no funciona: los conjuntos con tiempo de espera usan recolectores de basura que necesitan cancelarse en la destrucción y que pueden esperar. Por lo tanto, las funciones de destrucción se dividen en dos: cancelar los recolectores de basura de forma segura al ejecutar el comando recibido por netlink y mover la parte restante solo a la devolución de llamada de rcu.

*Credits: N/A

CVSS Scores

NISTv3.1 4.7

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-04-17 CVE Published
2024-04-30 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CAPEC

References (15)

URL	Tag	Source
https://git.kernel.org/stable/c/427deb5ba5661c4ae1cfb35955d2e01bd5f3090a	Vuln. Introduced
https://git.kernel.org/stable/c/e7152a138a5ac77439ff4e7a7533448a7d4c260d	Vuln. Introduced
https://git.kernel.org/stable/c/8bb930c3a1eacec1b14817f565ff81667c7c5dfa	Vuln. Introduced
https://git.kernel.org/stable/c/875ee3a09e27b7adb7006ca6d16faf7f33415aa5	Vuln. Introduced
https://git.kernel.org/stable/c/23c31036f862582f98386120aee55c9ae23d7899	Vuln. Introduced
https://git.kernel.org/stable/c/28628fa952fefc7f2072ce6e8016968cc452b1ba	Vuln. Introduced
https://git.kernel.org/stable/c/a12606e5ad0cee8f4ba3ec68561c4d6275d2df57	Vuln. Introduced
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/c7f2733e5011bfd136f1ca93497394d43aa76225	2024-02-23
https://git.kernel.org/stable/c/a24d5f2ac8ef702a58e55ec276aad29b4bd97e05	2024-02-23
https://git.kernel.org/stable/c/c2dc077d8f722a1c73a24e674f925602ee5ece49	2024-02-23
https://git.kernel.org/stable/c/653bc5e6d9995d7d5f497c665b321875a626161c	2024-02-23
https://git.kernel.org/stable/c/b93a6756a01f4fd2f329a39216f9824c56a66397	2024-02-23
https://git.kernel.org/stable/c/970709a67696b100a57b33af1a3d75fc34b747eb	2024-02-23
https://git.kernel.org/stable/c/97f7cf1cd80eeed3b7c808b7c12463295c751001	2024-01-31

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"				>= 5.4.264 < 5.4.269 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.4.264 < 5.4.269"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.10.204 < 5.10.210 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.204 < 5.10.210"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.15.143 < 5.15.149 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.143 < 5.15.149"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.1.68 < 6.1.79 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.1.68 < 6.1.79"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.6.7 < 6.6.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.6.7 < 6.6.18"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.7 < 6.7.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.7.6"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 6.7 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.7 < 6.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				4.19.302 Search vendor "Linux" for product "Linux Kernel" and version "4.19.302"		en		Affected