{"id":"CVE-2024-50133","summary":"LoongArch: Don't crash in stack_top() for tasks without vDSO","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Don't crash in stack_top() for tasks without vDSO\n\nNot all tasks have a vDSO mapped, for example kthreads never do. If such\na task ever ends up calling stack_top(), it will derefence the NULL vdso\npointer and crash.\n\nThis can for example happen when using kunit:\n\n\t[\u003c9000000000203874\u003e] stack_top+0x58/0xa8\n\t[\u003c90000000002956cc\u003e] arch_pick_mmap_layout+0x164/0x220\n\t[\u003c90000000003c284c\u003e] kunit_vm_mmap_init+0x108/0x12c\n\t[\u003c90000000003c1fbc\u003e] __kunit_add_resource+0x38/0x8c\n\t[\u003c90000000003c2704\u003e] kunit_vm_mmap+0x88/0xc8\n\t[\u003c9000000000410b14\u003e] usercopy_test_init+0xbc/0x25c\n\t[\u003c90000000003c1db4\u003e] kunit_try_run_case+0x5c/0x184\n\t[\u003c90000000003c3d54\u003e] kunit_generic_run_threadfn_adapter+0x24/0x48\n\t[\u003c900000000022e4bc\u003e] kthread+0xc8/0xd4\n\t[\u003c9000000000200ce8\u003e] ret_from_kernel_thread+0xc/0xa4","modified":"2026-04-16T04:31:25.235350081Z","published":"2024-11-05T17:10:58.264Z","related":["USN-7276-1","USN-7277-1","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50133.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/041cc3860b06770357876d1114d615333b0fbf31"},{"type":"WEB","url":"https://git.kernel.org/stable/c/134475a9ab8487527238d270639a8cb74c10aab2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a67d4a02bf43e15544179895ede7d5f97b84b550"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a94c197d4d749954dfaa37e907fcc8c04e4aad7e"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50133.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50133"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"803b0fc5c3f2baa6e54978cd576407896f789b08"},{"fixed":"a67d4a02bf43e15544179895ede7d5f97b84b550"},{"fixed":"a94c197d4d749954dfaa37e907fcc8c04e4aad7e"},{"fixed":"041cc3860b06770357876d1114d615333b0fbf31"},{"fixed":"134475a9ab8487527238d270639a8cb74c10aab2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50133.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}