Description

In the Linux kernel, the following vulnerability has been resolved: nitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert After commit 5b78ed24e8ec ("mm/pagemap: add mmap_assert_locked() annotations to find_vma*()"), the call to get_user_pages() will trigger the mmap assert. static inline void mmap_assert_locked(struct mm_struct *mm) { lockdep_assert_held(&mm->mmap_lock); VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm); } [ 62.521410] kernel BUG at include/linux/mmap_lock.h:156! ........................................................... [ 62.538938] RIP: 0010:find_vma+0x32/0x80 ........................................................... [ 62.605889] Call Trace: [ 62.608502] <TASK> [ 62.610956] ? lock_timer_base+0x61/0x80 [ 62.614106] find_extend_vma+0x19/0x80 [ 62.617195] __get_user_pages+0x9b/0x6a0 [ 62.620356] __gup_longterm_locked+0x42d/0x450 [ 62.623721] ? finish_wait+0x41/0x80 [ 62.626748] ? __kmalloc+0x178/0x2f0 [ 62.629768] ne_set_user_memory_region_ioctl.isra.0+0x225/0x6a0 [nitro_enclaves] [ 62.635776] ne_enclave_ioctl+0x1cf/0x6d7 [nitro_enclaves] [ 62.639541] __x64_sys_ioctl+0x82/0xb0 [ 62.642620] do_syscall_64+0x3b/0x90 [ 62.645642] entry_SYSCALL_64_after_hwframe+0x44/0xae Use get_user_pages_unlocked() when setting the enclave memory regions. That's a similar pattern as mmap_read_lock() used together with get_user_pages().

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:  5.5 MEDIUM

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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/3a0152b219523227c2a62a0a122cf99608287176	Patch
https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-667	Improper Locking	NIST

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Change History

4 change records found show changes

CVE Modified by kernel.org 5/28/2024 4:15:25 PM

Action	Type	Old Value	New Value

CVE Modified by kernel.org 5/14/2024 5:45:55 AM

Action	Type	Old Value	New Value

Initial Analysis by NIST 4/10/2024 12:25:32 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15.0 up to (excluding) 5.15.13
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-667
Changed	Reference Type	https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176 No Types Assigned	https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543 No Types Assigned	https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543 Patch

New CVE Received by NIST 2/27/2024 5:15:07 AM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1426 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: nitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert After commit 5b78ed24e8ec ("mm/pagemap: add mmap_assert_locked() annotations to find_vma*()"), the call to get_user_pages() will trigger the mmap assert. static inline void mmap_assert_locked(struct mm_struct *mm) { lockdep_assert_held(&mm->mmap_lock); VM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm); } [ 62.521410] kernel BUG at include/linux/mma
Added	Reference		Linux https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176 [No types assigned]
Added	Reference		Linux https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543 [No types assigned]