CVE-2024-50222

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-50222
In the Linux kernel, the following vulnerability has been resolved: iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP generic/077 on x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y with highmem, on huge=always tmpfs, issues a warning and then hangs (interruptibly): WARNING: CPU: 5 PID: 3517 at mm/highmem.c:622 kunmap_local_indexed+0x62/0xc9 CPU: 5 UID: 0 PID: 3517 Comm: cp Not tainted 6.12.0-rc4 #2 ... copy_page_from_iter_atomic+0xa6/0x5ec generic_perform_write+0xf6/0x1b4 shmem_file_write_iter+0x54/0x67 Fix copy_page_from_iter_atomic() by limiting it in that case (include/linux/skbuff.h skb_frag_must_loop() does similar). But going forward, perhaps CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP is too surprising, has outlived its usefulness, and should just be removed?

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/3a303409f271dfe0987b8f79595138340497a32d Patch
https://git.kernel.org/stable/c/4f7ffa83fa79dd52efbaef366c850aaaae06a469 Patch
https://git.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ec 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:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*
History

13 Nov 2024, 19:23

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/3a303409f271dfe0987b8f79595138340497a32d - () https://git.kernel.org/stable/c/3a303409f271dfe0987b8f79595138340497a32d - Patch
References () https://git.kernel.org/stable/c/4f7ffa83fa79dd52efbaef366c850aaaae06a469 - () https://git.kernel.org/stable/c/4f7ffa83fa79dd52efbaef366c850aaaae06a469 - Patch
References () https://git.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ec - () https://git.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ec - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*
CWE NVD-CWE-noinfo
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

12 Nov 2024, 13:56

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iov_iter: se corrige copy_page_from_iter_atomic() si KMAP_LOCAL_FORCE_MAP generic/077 en x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y con highmem, en huge=always tmpfs, emite una advertencia y luego se cuelga (de manera interrumpida): ADVERTENCIA: CPU: 5 PID: 3517 en mm/highmem.c:622 kunmap_local_indexed+0x62/0xc9 CPU: 5 UID: 0 PID: 3517 Comm: cp No contaminado 6.12.0-rc4 #2 ... copy_page_from_iter_atomic+0xa6/0x5ec generic_perform_write+0xf6/0x1b4 shmem_file_write_iter+0x54/0x67 Arregla copy_page_from_iter_atomic() limitándolo en ese caso (include/linux/skbuff.h skb_frag_must_loop() hace algo similar). Pero, en el futuro, ¿quizás CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP sea demasiado sorprendente, haya dejado de ser útil y simplemente deba eliminarse?

09 Nov 2024, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-11-09 11:15

Updated : 2024-11-13 19:23

NVD link : CVE-2024-50222

Mitre link : CVE-2024-50222

CVE.ORG link : CVE-2024-50222

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo