CVE-2025-38383

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-38383
In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: fix data race in show_numa_info() The following data-race was found in show_numa_info(): ================================================================== BUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show read to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0: show_numa_info mm/vmalloc.c:4936 [inline] vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... write to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1: show_numa_info mm/vmalloc.c:4934 [inline] vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... value changed: 0x0000008f -> 0x00000000 ================================================================== According to this report,there is a read/write data-race because m->private is accessible to multiple CPUs. To fix this, instead of allocating the heap in proc_vmalloc_init() and passing the heap address to m->private, vmalloc_info_show() should allocate the heap.

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

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/5c5f0468d172ddec2e333d738d2a1f85402cf0bc Patch
https://git.kernel.org/stable/c/5c966f447a584ece3c70395898231aeb56256ee7 Patch
https://git.kernel.org/stable/c/ead91de35d9cd5c4f80ec51e6020f342079170af Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

19 Nov 2025, 20:10

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/vmalloc: corrección de la ejecución de datos en show_numa_info() Se encontró la siguiente ejecución de datos en show_numa_info(): ================================================================== BUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show read to 0xffff88800971fe30 of 4 bytes by task 8289 on cpu 0: show_numa_info mm/vmalloc.c:4936 [inline] vmalloc_info_show+0x5a8/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... write to 0xffff88800971fe30 of 4 bytes by task 8287 on cpu 1: show_numa_info mm/vmalloc.c:4934 [inline] vmalloc_info_show+0x38f/0x7e0 mm/vmalloc.c:5016 seq_read_iter+0x373/0xb40 fs/seq_file.c:230 proc_reg_read_iter+0x11e/0x170 fs/proc/inode.c:299 .... value changed: 0x0000008f -> 0x00000000 ================================================================== Según este informe, existe una competencia de lectura/escritura de datos porque m->private es accesible a varias CPU. Para solucionar esto, en lugar de asignar el montón en proc_vmalloc_init() y pasar la dirección del montón a m->private, vmalloc_info_show() debería asignarlo.
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux
Linux linux Kernel
CWE CWE-362
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7
References () https://git.kernel.org/stable/c/5c5f0468d172ddec2e333d738d2a1f85402cf0bc - () https://git.kernel.org/stable/c/5c5f0468d172ddec2e333d738d2a1f85402cf0bc - Patch
References () https://git.kernel.org/stable/c/5c966f447a584ece3c70395898231aeb56256ee7 - () https://git.kernel.org/stable/c/5c966f447a584ece3c70395898231aeb56256ee7 - Patch
References () https://git.kernel.org/stable/c/ead91de35d9cd5c4f80ec51e6020f342079170af - () https://git.kernel.org/stable/c/ead91de35d9cd5c4f80ec51e6020f342079170af - Patch

25 Jul 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-25 13:15

Updated : 2025-11-19 20:10

NVD link : CVE-2025-38383

Mitre link : CVE-2025-38383

CVE.ORG link : CVE-2025-38383

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')