UBUNTU-CVE-2024-26901
In the Linux kernel, the following vulnerability has been resolved: do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak syzbot identified a kernel information leak vulnerability in do_sys_name_to_handle() and issued the following report [1]. [1] "BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x100 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] do_sys_name_to_handle fs/fhandle.c:73 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] do_sys_name_to_handle fs/fhandle.c:39 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Bytes 18-19 of 20 are uninitialized Memory access of size 20 starts at ffff888128a46380 Data copied to user address 0000000020000240" Per Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to solve the problem.
02 / AFFECTED SOFTWARE
Affected packages
20 explicit affected versions
74 explicit affected versions
43 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
19 explicit affected versions
6 explicit affected versions
52 explicit affected versions
4 explicit affected versions
38 explicit affected versions
61 explicit affected versions
49 explicit affected versions
38 explicit affected versions
10 explicit affected versions
3 explicit affected versions
45 explicit affected versions
191 explicit affected versions
7 explicit affected versions
46 explicit affected versions
88 explicit affected versions
13 explicit affected versions
62 explicit affected versions
35 explicit affected versions
5 explicit affected versions
14 explicit affected versions
18 explicit affected versions
7 explicit affected versions
93 explicit affected versions
33 explicit affected versions
5 explicit affected versions
90 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
98 explicit affected versions
7 explicit affected versions
1 explicit affected versions
21 explicit affected versions
16 explicit affected versions
10 explicit affected versions
45 explicit affected versions
5 explicit affected versions
7 explicit affected versions
12 explicit affected versions
36 explicit affected versions
12 explicit affected versions
14 explicit affected versions
7 explicit affected versions
78 explicit affected versions
12 explicit affected versions
93 explicit affected versions
101 explicit affected versions
12 explicit affected versions
89 explicit affected versions
10 explicit affected versions
52 explicit affected versions
10 explicit affected versions
164 explicit affected versions
37 explicit affected versions
97 explicit affected versions
13 explicit affected versions
10 explicit affected versions
25 explicit affected versions
1 explicit affected versions
31 explicit affected versions
26 explicit affected versions
13 explicit affected versions
4 explicit affected versions
1 explicit affected versions
29 explicit affected versions
81 explicit affected versions
13 explicit affected versions
49 explicit affected versions
1 explicit affected versions
77 explicit affected versions
47 explicit affected versions
93 explicit affected versions
9 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
91 explicit affected versions
11 explicit affected versions
12 explicit affected versions
114 explicit affected versions
7 explicit affected versions
12 explicit affected versions
92 explicit affected versions
2 explicit affected versions
37 explicit affected versions
30 explicit affected versions
107 explicit affected versions
46 explicit affected versions
127 explicit affected versions
10 explicit affected versions
26 explicit affected versions
6 explicit affected versions
27 explicit affected versions
1 explicit affected versions
6 explicit affected versions
13 explicit affected versions
5 explicit affected versions
114 explicit affected versions
51 explicit affected versions
16 explicit affected versions
49 explicit affected versions
6 explicit affected versions
39 explicit affected versions
3 explicit affected versions
68 explicit affected versions
1 explicit affected versions
2 explicit affected versions
58 explicit affected versions
51 explicit affected versions
67 explicit affected versions
3 explicit affected versions
12 explicit affected versions
35 explicit affected versions
27 explicit affected versions
21 explicit affected versions
1 explicit affected versions
1 explicit affected versions
71 explicit affected versions
8 explicit affected versions
10 explicit affected versions
5 explicit affected versions
8 explicit affected versions
1 explicit affected versions
10 explicit affected versions
2 explicit affected versions
13 explicit affected versions
81 explicit affected versions
13 explicit affected versions
45 explicit affected versions
7 explicit affected versions
69 explicit affected versions
41 explicit affected versions
10 explicit affected versions
12 explicit affected versions
12 explicit affected versions
80 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
35 explicit affected versions
37 explicit affected versions
6 explicit affected versions
14 explicit affected versions
38 explicit affected versions
118 explicit affected versions
97 explicit affected versions
11 explicit affected versions
29 explicit affected versions
4 explicit affected versions
46 explicit affected versions
121 explicit affected versions
141 explicit affected versions
10 explicit affected versions
8 explicit affected versions
1 explicit affected versions
39 explicit affected versions
9 explicit affected versions
14 explicit affected versions
81 explicit affected versions
4 explicit affected versions
38 explicit affected versions
11 explicit affected versions
1 explicit affected versions
1 explicit affected versions
44 explicit affected versions
141 explicit affected versions
46 explicit affected versions
7 explicit affected versions
90 explicit affected versions
13 explicit affected versions
43 explicit affected versions
70 explicit affected versions
11 explicit affected versions
1 explicit affected versions
44 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak syzbot identified a kernel information leak vulnerability in do_sys_name_to_handle() and issued the following report [1]. [1] "BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x100 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] do_sys_name_to_handle fs/fhandle.c:73 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] do_sys_name_to_handle fs/fhandle.c:39 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Bytes 18-19 of 20 are uninitialized Memory access of size 20 starts at ffff888128a46380 Data copied to user address 0000000020000240" Per Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to solve the problem.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/3948abaa4e2be938ccdfc289385a27342fb13d43
- https://git.kernel.org/stable/c/3948abaa4e2be938ccdfc289385a27342fb13d43
- https://git.kernel.org/stable/c/423b6bdf19bbc5e1f7e7461045099917378f7e71
- https://git.kernel.org/stable/c/4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1
- https://git.kernel.org/stable/c/772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b
- https://git.kernel.org/stable/c/bf9ec1b24ab4e94345aa1c60811dd329f069c38b
- https://git.kernel.org/stable/c/c1362eae861db28b1608b9dc23e49634fe87b63b
- https://git.kernel.org/stable/c/cba138f1ef37ec6f961baeab62f312dedc7cf730
- https://git.kernel.org/stable/c/cde76b3af247f615447bcfecf610bb76c3529126
- https://git.kernel.org/stable/c/e6450d5e46a737a008b4885aa223486113bf0ad6
- https://ubuntu.com/security/CVE-2024-26901
- https://ubuntu.com/security/notices/USN-6816-1
- https://ubuntu.com/security/notices/USN-6817-1
- https://ubuntu.com/security/notices/USN-6817-2
- https://ubuntu.com/security/notices/USN-6817-3
- https://ubuntu.com/security/notices/USN-6820-1
- https://ubuntu.com/security/notices/USN-6820-2
- https://ubuntu.com/security/notices/USN-6821-1
- https://ubuntu.com/security/notices/USN-6821-2
- https://ubuntu.com/security/notices/USN-6821-3
- https://ubuntu.com/security/notices/USN-6821-4
- https://ubuntu.com/security/notices/USN-6828-1
- https://ubuntu.com/security/notices/USN-6871-1
- https://ubuntu.com/security/notices/USN-6878-1
- https://ubuntu.com/security/notices/USN-6892-1
- https://ubuntu.com/security/notices/USN-6896-1
- https://ubuntu.com/security/notices/USN-6896-2
- https://ubuntu.com/security/notices/USN-6896-3
- https://ubuntu.com/security/notices/USN-6896-4
- https://ubuntu.com/security/notices/USN-6896-5
- https://ubuntu.com/security/notices/USN-6919-1
- https://ubuntu.com/security/notices/USN-6926-1
- https://ubuntu.com/security/notices/USN-6926-2
- https://ubuntu.com/security/notices/USN-6926-3
- https://ubuntu.com/security/notices/USN-6938-1
- https://www.cve.org/CVERecord?id=CVE-2024-26901