CVE-2024-50133

MEDIUM

Linux Kernel 5.19-6.1.114, 6.2-6.6.58, 6.7-6.11.5 - NULL Pointer Dereference in stack_top()

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Don't crash in stack_top() for tasks without vDSO Not all tasks have a vDSO mapped, for example kthreads never do. If such a task ever ends up calling stack_top(), it will derefence the NULL vdso pointer and crash. This can for example happen when using kunit: [<9000000000203874>] stack_top+0x58/0xa8 [<90000000002956cc>] arch_pick_mmap_layout+0x164/0x220 [<90000000003c284c>] kunit_vm_mmap_init+0x108/0x12c [<90000000003c1fbc>] __kunit_add_resource+0x38/0x8c [<90000000003c2704>] kunit_vm_mmap+0x88/0xc8 [<9000000000410b14>] usercopy_test_init+0xbc/0x25c [<90000000003c1db4>] kunit_try_run_case+0x5c/0x184 [<90000000003c3d54>] kunit_generic_run_threadfn_adapter+0x24/0x48 [<900000000022e4bc>] kthread+0xc8/0xd4 [<9000000000200ce8>] ret_from_kernel_thread+0xc/0xa4

References (5)

Core 5

Scores

CVSS v3 5.5
EPSS 0.0022
EPSS Percentile 11.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (15)
linux/Kernel 5.19.0 - 6.1.115linux
linux/Kernel 6.2.0 - 6.6.59linux
linux/Kernel 6.7.0 - 6.11.6linux
Linux/Linux < 5.19
Linux/Linux 5.19
Linux/Linux 6.1.115 - 6.1.*
Linux/Linux 6.11.6 - 6.11.*
Linux/Linux 6.12
Linux/Linux 6.6.59 - 6.6.*
Linux/Linux 803b0fc5c3f2baa6e54978cd576407896f789b08 - 041cc3860b06770357876d1114d615333b0fbf31
... and 5 more
Published Nov 05, 2024
Tracked Since Feb 18, 2026