CVE-2024-27079

iommu/vt-d: Fix NULL domain on device release

Severity Score

5.5

*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:

iommu/vt-d: Fix NULL domain on device release

In the kdump kernel, the IOMMU operates in deferred_attach mode. In this
mode, info->domain may not yet be assigned by the time the release_device
function is called. It leads to the following crash in the crash kernel:

BUG: kernel NULL pointer dereference, address: 000000000000003c
...
RIP: 0010:do_raw_spin_lock+0xa/0xa0
...
_raw_spin_lock_irqsave+0x1b/0x30
intel_iommu_release_device+0x96/0x170
iommu_deinit_device+0x39/0xf0
__iommu_group_remove_device+0xa0/0xd0
iommu_bus_notifier+0x55/0xb0
notifier_call_chain+0x5a/0xd0
blocking_notifier_call_chain+0x41/0x60
bus_notify+0x34/0x50
device_del+0x269/0x3d0
pci_remove_bus_device+0x77/0x100
p2sb_bar+0xae/0x1d0
...
i801_probe+0x423/0x740

Use the release_domain mechanism to fix it. The scalable mode context
entry which is not part of release domain should be cleared in
release_device().

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: iommu/vt-d: corrige el dominio NULL al lanzar el dispositivo. En el kernel kdump, IOMMU opera en modo deferred_attach. En este modo, es posible que info->dominio aún no esté asignado cuando se llama a la función release_device. Conduce al siguiente bloqueo en el kernel bloqueado: ERROR: desreferencia del puntero NULL del kernel, dirección: 000000000000003c ... RIP: 0010:do_raw_spin_lock+0xa/0xa0 ... _raw_spin_lock_irqsave+0x1b/0x30 intel_iommu_release_device+0x96/0x170 +0x39/ 0xf0 __iommu_group_remove_device+0xa0/0xd0 iommu_bus_notifier+0x55/0xb0 notifier_call_chain+0x5a/0xd0 blocking_notifier_call_chain+0x41/0x60 bus_notify+0x34/0x50 device_del+0x269/0x3d0 vice+0x77/0x100 p2sb_bar+0xae/0x1d0 ... i801_probe+0x423/0x740 Uso el mecanismo release_domain para solucionarlo. La entrada de contexto del modo escalable que no forma parte del dominio de lanzamiento debe borrarse en release_device().

*Credits: N/A

CVSS Scores

Red Hatv3.1 5.5

Attack Vector

Local

Attack Complexity

Low

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
2024-05-01 CVE Published
2024-05-02 EPSS Updated
2024-11-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/586081d3f6b13ec9dfdfdf3d7842a688b376fa5e	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/333fe86968482ca701c609af590003bcea450e8f	2024-03-26
https://git.kernel.org/stable/c/81e921fd321614c2ad8ac333b041aae1da7a1c6d	2024-03-06

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-27079	2024-11-12
https://bugzilla.redhat.com/show_bug.cgi?id=2278492	2024-11-12

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"				>= 5.18 < 6.8.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.18 < 6.8.2"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 5.18 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.18 < 6.9"		en		Affected