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CVE-2024-50133

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
05/11/2024
Last modified:
07/11/2024

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> LoongArch: Don&amp;#39;t crash in stack_top() for tasks without vDSO<br /> <br /> Not all tasks have a vDSO mapped, for example kthreads never do. If such<br /> a task ever ends up calling stack_top(), it will derefence the NULL vdso<br /> pointer and crash.<br /> <br /> This can for example happen when using kunit:<br /> <br /> [] stack_top+0x58/0xa8<br /> [] arch_pick_mmap_layout+0x164/0x220<br /> [] kunit_vm_mmap_init+0x108/0x12c<br /> [] __kunit_add_resource+0x38/0x8c<br /> [] kunit_vm_mmap+0x88/0xc8<br /> [] usercopy_test_init+0xbc/0x25c<br /> [] kunit_try_run_case+0x5c/0x184<br /> [] kunit_generic_run_threadfn_adapter+0x24/0x48<br /> [] kthread+0xc8/0xd4<br /> [] ret_from_kernel_thread+0xc/0xa4

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.19 (including) 6.1.115 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.59 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.11.6 (excluding)
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:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools