CVE-2024-41083

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_page_mkwrite() to check folio->mapping is valid Fix netfs_page_mkwrite() to check that folio->mapping is valid once it has taken the folio lock (as filemap_page_mkwrite() does). Without this, generic/247 occasionally oopses with something like the following: BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page RIP: 0010:trace_event_raw_event_netfs_folio+0x61/0xc0 ... Call Trace: <TASK> ? __die_body+0x1a/0x60 ? page_fault_oops+0x6e/0xa0 ? exc_page_fault+0xc2/0xe0 ? asm_exc_page_fault+0x22/0x30 ? trace_event_raw_event_netfs_folio+0x61/0xc0 trace_netfs_folio+0x39/0x40 netfs_page_mkwrite+0x14c/0x1d0 do_page_mkwrite+0x50/0x90 do_pte_missing+0x184/0x200 __handle_mm_fault+0x42d/0x500 handle_mm_fault+0x121/0x1f0 do_user_addr_fault+0x23e/0x3c0 exc_page_fault+0xc2/0xe0 asm_exc_page_fault+0x22/0x30 This is due to the invalidate_inode_pages2_range() issued at the end of the DIO write interfering with the mmap'd writes.

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/3473eb87afd402e415a8ca885b284ea0420dde25	Patch
https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2	Patch
https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25	Patch
https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

History

21 Nov 2024, 09:32

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25 - Patch~~	() https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25 - Patch
References	~~() https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2 - Patch~~	() https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2 - Patch

26 Aug 2024, 14:23

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: corrija netfs_page_mkwrite() para verificar que folio->mapping sea válido. Corrija netfs_page_mkwrite() para verificar que folio->mapping sea válido una vez que haya tomado el bloqueo de folio (como filemap_page_mkwrite( ) hace). Sin esto, generic/247 ocasionalmente falla con algo como lo siguiente: ERROR: desreferencia del puntero NULL del kernel, dirección: 0000000000000000 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - página no presente RIP: 0010:trace_event_raw_event_netfs_folio +0x61/0xc0... Seguimiento de llamadas: ? __die_body+0x1a/0x60 ? page_fault_oops+0x6e/0xa0? exc_page_fault+0xc2/0xe0? asm_exc_page_fault+0x22/0x30? trace_event_raw_event_netfs_folio+0x61/0xc0 trace_netfs_folio+0x39/0x40 netfs_page_mkwrite+0x14c/0x1d0 do_page_mkwrite+0x50/0x90 do_pte_missing+0x184/0x200 __handle_mm_fault+0x42d/0x500 _fault+0x121/0x1f0 do_user_addr_fault+0x23e/0x3c0 exc_page_fault+0xc2/0xe0 asm_exc_page_fault+0x22/0x30 Esto se debe a que invalidate_inode_pages2_range() emitido al final de la escritura DIO interfiere con las escrituras mmap.
CPE		cpe:2.3:o:linux:linux_kernel::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CWE		CWE-476
References	~~() https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25 -~~	() https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25 - Patch
References	~~() https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2 -~~	() https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2 - Patch
First Time		Linux Linux linux Kernel

29 Jul 2024, 16:21

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-07-29 16:15

Updated : 2024-11-21 09:32

NVD link : CVE-2024-41083

Mitre link : CVE-2024-41083

CVE.ORG link : CVE-2024-41083

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

5.5 /10