CVE-2024-26709

powerpc/iommu: Fix the missing iommu_group_put() during platform domain attach

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:

powerpc/iommu: Fix the missing iommu_group_put() during platform domain attach

The function spapr_tce_platform_iommu_attach_dev() is missing to call
iommu_group_put() when the domain is already set. This refcount leak
shows up with BUG_ON() during DLPAR remove operation as:

KernelBug: Kernel bug in state 'None': kernel BUG at arch/powerpc/platforms/pseries/iommu.c:100!
Oops: Exception in kernel mode, sig: 5 [#1]
LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA pSeries
<snip>
Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 0xf000006 of:IBM,FW1060.00 (NH1060_016) hv:phyp pSeries
NIP: c0000000000ff4d4 LR: c0000000000ff4cc CTR: 0000000000000000
REGS: c0000013aed5f840 TRAP: 0700 Tainted: G I (6.8.0-rc3-autotest-g99bd3cb0d12e)
MSR: 8000000000029033 <SF,EE,ME,IR,DR,RI,LE> CR: 44002402 XER: 20040000
CFAR: c000000000a0d170 IRQMASK: 0
...
NIP iommu_reconfig_notifier+0x94/0x200
LR iommu_reconfig_notifier+0x8c/0x200
Call Trace:
iommu_reconfig_notifier+0x8c/0x200 (unreliable)
notifier_call_chain+0xb8/0x19c
blocking_notifier_call_chain+0x64/0x98
of_reconfig_notify+0x44/0xdc
of_detach_node+0x78/0xb0
ofdt_write.part.0+0x86c/0xbb8
proc_reg_write+0xf4/0x150
vfs_write+0xf8/0x488
ksys_write+0x84/0x140
system_call_exception+0x138/0x330
system_call_vectored_common+0x15c/0x2ec

The patch adds the missing iommu_group_put() call.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/iommu: corrige el iommu_group_put() que falta durante la conexión del dominio de la plataforma. Falta la función spapr_tce_platform_iommu_attach_dev() para llamar a iommu_group_put() cuando el dominio ya está configurado. Esta fuga de recuento aparece con BUG_ON() durante la operación de eliminación de DLPAR como: KernelBug: Error del kernel en estado 'Ninguno': ERROR del kernel en arch/powerpc/platforms/pseries/iommu.c:100. Vaya: Excepción en modo kernel, sign: 5 [#1] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=8192 NUMA pSeries Nombre de hardware: IBM,9080-HEX POWER10 (sin formato) 0x800200 0xf000006 of:IBM,FW1060. 00 (NH1060_016) hv:phyp pSeries NIP: c0000000000ff4d4 LR: c0000000000ff4cc CTR: 0000000000000000 REGS: c0000013aed5f840 TRAP: 0700 Contaminado: GI (6.8.0-rc3-autotest-g9 9bd3cb0d12e) MSR: 8000000000029033 CR: 44002402 XER: 20040000 CFAR: c000000000a0d170 IRQMASK: 0 ... NIP iommu_reconfig_notifier+0x94/0x200 LR iommu_reconfig_notifier+0x8c/0x200 Seguimiento de llamadas: iommu_reconfig_notifier+0x8c/0x2 00 (no confiable) notifier_call_chain+0xb8/0x19c blocking_notifier_call_chain+ 0x64/0x98 of_reconfig_notify+0x44/0xdc of_detach_node+0x78/0xb0 ofdt_write.part.0+0x86c/0xbb8 proc_reg_write+0xf4/0x150 vfs_write+0xf8/0x488 ksys_write+0x84/0x140 system_call_exception+0x1 38/0x330 system_call_vectored_common+0x15c/0x2ec El parche agrega la llamada faltante a iommu_group_put().

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

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

2024-02-19 CVE Reserved
2024-04-03 CVE Published
2024-04-04 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (3)

URL	Tag	Source
https://git.kernel.org/stable/c/a8ca9fc9134c1a43e6d4db7ff59496bbd7075def	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/c90fdea9cac9eb419fc266e75d625cb60c8f7f6c	2024-02-23
https://git.kernel.org/stable/c/0846dd77c8349ec92ca0079c9c71d130f34cb192	2024-02-14

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 < 6.7.6 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