Description

In the Linux kernel, the following vulnerability has been resolved: PCI/MSI: Fix UAF in msi_capability_init KFENCE reports the following UAF: BUG: KFENCE: use-after-free read in __pci_enable_msi_range+0x2c0/0x488 Use-after-free read at 0x0000000024629571 (in kfence-#12): __pci_enable_msi_range+0x2c0/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 kfence-#12: 0x0000000008614900-0x00000000e06c228d, size=104, cache=kmalloc-128 allocated by task 81 on cpu 7 at 10.808142s: __kmem_cache_alloc_node+0x1f0/0x2bc kmalloc_trace+0x44/0x138 msi_alloc_desc+0x3c/0x9c msi_domain_insert_msi_desc+0x30/0x78 msi_setup_msi_desc+0x13c/0x184 __pci_enable_msi_range+0x258/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 freed by task 81 on cpu 7 at 10.811436s: msi_domain_free_descs+0xd4/0x10c msi_domain_free_locked.part.0+0xc0/0x1d8 msi_domain_alloc_irqs_all_locked+0xb4/0xbc pci_msi_setup_msi_irqs+0x30/0x4c __pci_enable_msi_range+0x2a8/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 Descriptor allocation done in: __pci_enable_msi_range msi_capability_init msi_setup_msi_desc msi_insert_msi_desc msi_domain_insert_msi_desc msi_alloc_desc ... Freed in case of failure in __msi_domain_alloc_locked() __pci_enable_msi_range msi_capability_init pci_msi_setup_msi_irqs msi_domain_alloc_irqs_all_locked msi_domain_alloc_locked __msi_domain_alloc_locked => fails msi_domain_free_locked ... That failure propagates back to pci_msi_setup_msi_irqs() in msi_capability_init() which accesses the descriptor for unmasking in the error exit path. Cure it by copying the descriptor and using the copy for the error exit path unmask operation. [ tglx: Massaged change log ]

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

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CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  7.8 HIGH

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

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Hyperlink	Resource
https://git.kernel.org/stable/c/0ae40b2d0a5de6b045504098e365d4fdff5bbeba
https://git.kernel.org/stable/c/45fc8d20e0768ab0a0ad054081d0f68aa3c83976	Patch
https://git.kernel.org/stable/c/9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1	Patch
https://git.kernel.org/stable/c/ff1121d2214b794dc1772081f27bdd90721a84bc	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	NIST

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Change History

3 change records found show changes

CVE Modified by kernel.org 9/08/2024 4:15:12 AM

Action	Type	Old Value	New Value
Added	Reference		kernel.org https://git.kernel.org/stable/c/0ae40b2d0a5de6b045504098e365d4fdff5bbeba [No types assigned]

Initial Analysis by NIST 8/08/2024 1:26:54 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.17 up to (excluding) 6.6.37 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.9.8
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Added	CWE		NIST CWE-416
Changed	Reference Type	https://git.kernel.org/stable/c/45fc8d20e0768ab0a0ad054081d0f68aa3c83976 No Types Assigned	https://git.kernel.org/stable/c/45fc8d20e0768ab0a0ad054081d0f68aa3c83976 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1 No Types Assigned	https://git.kernel.org/stable/c/9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/ff1121d2214b794dc1772081f27bdd90721a84bc No Types Assigned	https://git.kernel.org/stable/c/ff1121d2214b794dc1772081f27bdd90721a84bc Patch

New CVE Received by NIST 7/29/2024 12:15:04 PM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1983 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: PCI/MSI: Fix UAF in msi_capability_init KFENCE reports the following UAF: BUG: KFENCE: use-after-free read in __pci_enable_msi_range+0x2c0/0x488 Use-after-free read at 0x0000000024629571 (in kfence-#12): __pci_enable_msi_range+0x2c0/0x488 pci_alloc_irq_vectors_affinity+0xec/0x14c pci_alloc_irq_vectors+0x18/0x28 kfence-#12: 0x0000000008614900-0x00000000e06c228d, size=104, cache=kmalloc-128 allocated by task 81 on
Added	Reference		kernel.org https://git.kernel.org/stable/c/45fc8d20e0768ab0a0ad054081d0f68aa3c83976 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/9eee5330656bf92f51cb1f09b2dc9f8cf975b3d1 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/ff1121d2214b794dc1772081f27bdd90721a84bc [No types assigned]