CVE-2024-46750

In the Linux kernel, the following vulnerability has been resolved: PCI: Add missing bridge lock to pci_bus_lock() One of the true positives that the cfg_access_lock lockdep effort identified is this sequence: WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Call Trace: <TASK> ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Where pci_reset_bus() users are triggering unlocked secondary bus resets. Ironically pci_bus_reset(), several calls down from pci_reset_bus(), uses pci_bus_lock() before issuing the reset which locks everything *but* the bridge itself. For the same motivation as adding: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); to pci_reset_function() for the "bus" and "cxl_bus" reset cases, add pci_dev_lock() for @bus->self to pci_bus_lock(). [bhelgaas: squash in recursive locking deadlock fix from Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945	Patch
https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9	Patch
https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083	Patch
https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a	Patch
https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da	Patch
https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab	Patch
https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b	Patch
https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

30 Sep 2024, 13:27

Type	Values Removed	Values Added
CPE		cpe:2.3:o:linux:linux_kernel::::::::
First Time		Linux linux Kernel Linux
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CWE		CWE-667
References	~~() https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 -~~	() https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 - Patch
References	~~() https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9 -~~	() https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9 - Patch
References	~~() https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083 -~~	() https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083 - Patch
References	~~() https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a -~~	() https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a - Patch
References	~~() https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da -~~	() https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da - Patch
References	~~() https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab -~~	() https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab - Patch
References	~~() https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b -~~	() https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b - Patch
References	~~() https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0 -~~	() https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0 - Patch

20 Sep 2024, 12:30

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: Agregar bloqueo de puente faltante a pci_bus_lock() Uno de los verdaderos positivos que identificó el esfuerzo de cfg_access_lock lockdep es esta secuencia: ADVERTENCIA: CPU: 14 PID: 1 en drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Rastreo de llamada: ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Donde los usuarios de pci_reset_bus() están activando reinicios de bus secundario desbloqueados. Irónicamente, pci_bus_reset(), varias llamadas después de pci_reset_bus(), usa pci_bus_lock() antes de emitir el reinicio que bloquea todo excepto el puente mismo. Por la misma motivación que agregar: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); Para pci_reset_function() en los casos de reinicio de "bus" y "cxl_bus", agregue pci_dev_lock() para @bus->self a pci_bus_lock(). [bhelgaas: solución de bloqueo recursivo de squash de Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]

18 Sep 2024, 08:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-09-18 08:15

Updated : 2024-09-30 13:27

NVD link : CVE-2024-46750

Mitre link : CVE-2024-46750

CVE.ORG link : CVE-2024-46750

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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Ir\u00f3nicamente, pci_bus_reset(), varias llamadas despu\u00e9s de pci_reset_bus(), usa pci_bus_lock() antes de emitir el reinicio que bloquea todo *excepto* el puente mismo. Por la misma motivaci\u00f3n que agregar: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); Para pci_reset_function() en los casos de reinicio de \"bus\" y \"cxl_bus\", agregue pci_dev_lock() para @bus->self a pci_bus_lock(). [bhelgaas: soluci\u00f3n de bloqueo recursivo de squash de Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]"}], "lastModified": "2024-09-30T13:27:45.787", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "29162FB8-5FA4-4DC4-86CE-5EB0CAEEF2F3", "versionEndExcluding": "4.19.322"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6265A402-9C3C-438F-BFC5-4194B2568B85", "versionEndExcluding": "5.4.284", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "864FC17C-501A-4823-A643-6F35D65D8A97", "versionEndExcluding": "5.10.226", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "043405A4-25FE-45D4-A7BB-2A0C3B7D17C1", "versionEndExcluding": "5.15.167", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B1A95FC-7E7E-428B-BB59-F76640C652AE", "versionEndExcluding": "6.1.110", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E4529134-BAC4-4776-840B-304009E181A0", "versionEndExcluding": "6.6.51", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ACDEE48C-137A-4731-90D0-A675865E1BED", "versionEndExcluding": "6.10.10", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

5.5 /10