UBUNTU-CVE-2024-50133
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
02 / AFFECTED SOFTWARE
Affected packages
16 explicit affected versions
14 explicit affected versions
29 explicit affected versions
10 explicit affected versions
11 explicit affected versions
15 explicit affected versions
1 explicit affected versions
2 explicit affected versions
18 explicit affected versions
7 explicit affected versions
26 explicit affected versions
37 explicit affected versions
10 explicit affected versions
10 explicit affected versions
13 explicit affected versions
13 explicit affected versions
17 explicit affected versions
11 explicit affected versions
37 explicit affected versions
8 explicit affected versions
4 explicit affected versions
8 explicit affected versions
19 explicit affected versions
23 explicit affected versions
7 explicit affected versions
14 explicit affected versions
10 explicit affected versions
16 explicit affected versions
33 explicit affected versions
16 explicit affected versions
13 explicit affected versions
12 explicit affected versions
38 explicit affected versions
1 explicit affected versions
51 explicit affected versions
13 explicit affected versions
10 explicit affected versions
10 explicit affected versions
13 explicit affected versions
1 explicit affected versions
1 explicit affected versions
10 explicit affected versions
1 explicit affected versions
20 explicit affected versions
8 explicit affected versions
1 explicit affected versions
13 explicit affected versions
21 explicit affected versions
6 explicit affected versions
13 explicit affected versions
12 explicit affected versions
20 explicit affected versions
7 explicit affected versions
14 explicit affected versions
20 explicit affected versions
12 explicit affected versions
26 explicit affected versions
1 explicit affected versions
16 explicit affected versions
23 explicit affected versions
7 explicit affected versions
13 explicit affected versions
14 explicit affected versions
5 explicit affected versions
3 explicit affected versions
23 explicit affected versions
26 explicit affected versions
21 explicit affected versions
12 explicit affected versions
44 explicit affected versions
21 explicit affected versions
4 explicit affected versions
4 explicit affected versions
22 explicit affected versions
16 explicit affected versions
9 explicit affected versions
12 explicit affected versions
7 explicit affected versions
19 explicit affected versions
13 explicit affected versions
26 explicit affected versions
21 explicit affected versions
8 explicit affected versions
7 explicit affected versions
13 explicit affected versions
7 explicit affected versions
10 explicit affected versions
14 explicit affected versions
25 explicit affected versions
12 explicit affected versions
18 explicit affected versions
24 explicit affected versions
3 explicit affected versions
16 explicit affected versions
19 explicit affected versions
43 explicit affected versions
11 explicit affected versions
35 explicit affected versions
12 explicit affected versions
13 explicit affected versions
6 explicit affected versions
12 explicit affected versions
1 explicit affected versions
50 explicit affected versions
11 explicit affected versions
12 explicit affected versions
15 explicit affected versions
27 explicit affected versions
12 explicit affected versions
7 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/134475a9ab8487527238d270639a8cb74c10aab2
- https://git.kernel.org/stable/c/041cc3860b06770357876d1114d615333b0fbf31
- https://git.kernel.org/stable/c/134475a9ab8487527238d270639a8cb74c10aab2
- https://git.kernel.org/stable/c/a67d4a02bf43e15544179895ede7d5f97b84b550
- https://git.kernel.org/stable/c/a94c197d4d749954dfaa37e907fcc8c04e4aad7e
- https://ubuntu.com/security/CVE-2024-50133
- https://ubuntu.com/security/notices/USN-7276-1
- https://ubuntu.com/security/notices/USN-7277-1
- https://ubuntu.com/security/notices/USN-7310-1
- https://ubuntu.com/security/notices/USN-7449-1
- https://ubuntu.com/security/notices/USN-7449-2
- https://ubuntu.com/security/notices/USN-7450-1
- https://ubuntu.com/security/notices/USN-7451-1
- https://ubuntu.com/security/notices/USN-7452-1
- https://ubuntu.com/security/notices/USN-7453-1
- https://ubuntu.com/security/notices/USN-7468-1
- https://ubuntu.com/security/notices/USN-7523-1
- https://ubuntu.com/security/notices/USN-7524-1
- https://www.cve.org/CVERecord?id=CVE-2024-50133