ghsa-x3fm-x4jg-jw2h
Vulnerability from github
Published
2024-11-05 18:32
Modified
2024-11-07 21:31
Severity ?
Details
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
{ "affected": [], "aliases": [ "CVE-2024-50133" ], "database_specific": { "cwe_ids": [ "CWE-476" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-11-05T18:15:16Z", "severity": "MODERATE" }, "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Don\u0027t 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", "id": "GHSA-x3fm-x4jg-jw2h", "modified": "2024-11-07T21:31:43Z", "published": "2024-11-05T18:32:12Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50133" }, { "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" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "type": "CVSS_V3" } ] }
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Sightings
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