CVE-2021-47523

IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr

Severity Score

"-"

*CVSS v-

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:

IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr

This buffer is currently allocated in hfi1_init():

if (reinit)
ret = init_after_reset(dd);
else
ret = loadtime_init(dd);
if (ret)
goto done;

/* allocate dummy tail memory for all receive contexts */
dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev,
sizeof(u64),
&dd->rcvhdrtail_dummy_dma,
GFP_KERNEL);

if (!dd->rcvhdrtail_dummy_kvaddr) {
dd_dev_err(dd, "cannot allocate dummy tail memory
");
ret = -ENOMEM;
goto done;
}

The reinit triggered path will overwrite the old allocation and leak it.

Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation
to hfi1_free_devdata().

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: IB/hfi1: Corrección de fuga de rcvhdrtail_dummy_kvaddr. Este búfer está actualmente asignado en hfi1_init(): if (reinit) ret = init_after_reset(dd); de lo contrario ret = loadtime_init(dd); si (ret) ir a hecho; /* asigna memoria de cola ficticia para todos los contextos de recepción */ dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev, sizeof(u64), &dd->rcvhdrtail_dummy_dma, GFP_KERNEL); if (!dd->rcvhdrtail_dummy_kvaddr) { dd_dev_err(dd, "no se puede asignar memoria de cola ficticia
"); ret = -ENOMEM; ir a hacer; } La ruta activada por reinicio sobrescribirá la asignación anterior y la filtrará. Para solucionarlo, mueva la asignación a hfi1_alloc_devdata() y la desasignación a hfi1_free_devdata().

*Credits: N/A

CVSS Scores

Attack Vector

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Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-05-24 CVE Reserved
2024-05-24 CVE Published
2024-05-25 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (4)

URL	Tag	Source
https://git.kernel.org/stable/c/46b010d3eeb8eb29c740c4ef09c666485f5c07e6	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc	2021-12-14
https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b	2021-12-14
https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1	2021-12-07

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"				>= 4.5 < 5.10.85 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.10.85"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.15.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.15.8"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.16"		en		Affected