UBUNTU-CVE-2024-50041
In the Linux kernel, the following vulnerability has been resolved: i40e: Fix macvlan leak by synchronizing access to mac_filter_hash This patch addresses a macvlan leak issue in the i40e driver caused by concurrent access to vsi->mac_filter_hash. The leak occurs when multiple threads attempt to modify the mac_filter_hash simultaneously, leading to inconsistent state and potential memory leaks. To fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing vf->default_lan_addr.addr with spin_lock/unlock_bh(&vsi->mac_filter_hash_lock), ensuring atomic operations and preventing concurrent access. Additionally, we add lockdep_assert_held(&vsi->mac_filter_hash_lock) in i40e_add_mac_filter() to help catch similar issues in the future. Reproduction steps: 1. Spawn VFs and configure port vlan on them. 2. Trigger concurrent macvlan operations (e.g., adding and deleting portvlan and/or mac filters). 3. Observe the potential memory leak and inconsistent state in the mac_filter_hash. This synchronization ensures the integrity of the mac_filter_hash and prevents the described leak.
02 / AFFECTED SOFTWARE
Affected packages
6 explicit affected versions
19 explicit affected versions
33 explicit affected versions
1 explicit affected versions
11 explicit affected versions
39 explicit affected versions
53 explicit affected versions
7 explicit affected versions
12 explicit affected versions
14 explicit affected versions
12 explicit affected versions
10 explicit affected versions
50 explicit affected versions
12 explicit affected versions
19 explicit affected versions
6 explicit affected versions
63 explicit affected versions
48 explicit affected versions
58 explicit affected versions
49 explicit affected versions
10 explicit affected versions
11 explicit affected versions
17 explicit affected versions
55 explicit affected versions
7 explicit affected versions
54 explicit affected versions
14 explicit affected versions
13 explicit affected versions
16 explicit affected versions
35 explicit affected versions
15 explicit affected versions
18 explicit affected versions
4 explicit affected versions
18 explicit affected versions
16 explicit affected versions
64 explicit affected versions
19 explicit affected versions
13 explicit affected versions
23 explicit affected versions
24 explicit affected versions
1 explicit affected versions
21 explicit affected versions
16 explicit affected versions
10 explicit affected versions
20 explicit affected versions
1 explicit affected versions
46 explicit affected versions
12 explicit affected versions
14 explicit affected versions
7 explicit affected versions
1 explicit affected versions
12 explicit affected versions
12 explicit affected versions
14 explicit affected versions
11 explicit affected versions
6 explicit affected versions
37 explicit affected versions
1 explicit affected versions
13 explicit affected versions
26 explicit affected versions
13 explicit affected versions
10 explicit affected versions
29 explicit affected versions
13 explicit affected versions
60 explicit affected versions
13 explicit affected versions
14 explicit affected versions
57 explicit affected versions
19 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
1 explicit affected versions
11 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
46 explicit affected versions
40 explicit affected versions
56 explicit affected versions
10 explicit affected versions
26 explicit affected versions
18 explicit affected versions
1 explicit affected versions
10 explicit affected versions
23 explicit affected versions
13 explicit affected versions
19 explicit affected versions
16 explicit affected versions
59 explicit affected versions
22 explicit affected versions
47 explicit affected versions
3 explicit affected versions
2 explicit affected versions
51 explicit affected versions
7 explicit affected versions
20 explicit affected versions
12 explicit affected versions
45 explicit affected versions
27 explicit affected versions
31 explicit affected versions
15 explicit affected versions
8 explicit affected versions
13 explicit affected versions
12 explicit affected versions
20 explicit affected versions
5 explicit affected versions
8 explicit affected versions
10 explicit affected versions
18 explicit affected versions
13 explicit affected versions
13 explicit affected versions
7 explicit affected versions
2 explicit affected versions
50 explicit affected versions
10 explicit affected versions
14 explicit affected versions
7 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
23 explicit affected versions
14 explicit affected versions
1 explicit affected versions
38 explicit affected versions
49 explicit affected versions
9 explicit affected versions
48 explicit affected versions
11 explicit affected versions
56 explicit affected versions
7 explicit affected versions
29 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
54 explicit affected versions
13 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
17 explicit affected versions
14 explicit affected versions
4 explicit affected versions
11 explicit affected versions
1 explicit affected versions
14 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: i40e: Fix macvlan leak by synchronizing access to mac_filter_hash This patch addresses a macvlan leak issue in the i40e driver caused by concurrent access to vsi->mac_filter_hash. The leak occurs when multiple threads attempt to modify the mac_filter_hash simultaneously, leading to inconsistent state and potential memory leaks. To fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing vf->default_lan_addr.addr with spin_lock/unlock_bh(&vsi->mac_filter_hash_lock), ensuring atomic operations and preventing concurrent access. Additionally, we add lockdep_assert_held(&vsi->mac_filter_hash_lock) in i40e_add_mac_filter() to help catch similar issues in the future. Reproduction steps: 1. Spawn VFs and configure port vlan on them. 2. Trigger concurrent macvlan operations (e.g., adding and deleting portvlan and/or mac filters). 3. Observe the potential memory leak and inconsistent state in the mac_filter_hash. This synchronization ensures the integrity of the mac_filter_hash and prevents the described leak.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb
- https://git.kernel.org/stable/c/703c4d820b31bcadf465288d5746c53445f02a55
- https://git.kernel.org/stable/c/8831abff1bd5b6bc8224f0c0671f46fbd702b5b2
- https://git.kernel.org/stable/c/9a9747288ba0a9ad4f5c9877f18dd245770ad64e
- https://git.kernel.org/stable/c/9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3
- https://git.kernel.org/stable/c/dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb
- https://ubuntu.com/security/CVE-2024-50041
- https://ubuntu.com/security/notices/USN-7166-1
- https://ubuntu.com/security/notices/USN-7166-2
- https://ubuntu.com/security/notices/USN-7166-3
- https://ubuntu.com/security/notices/USN-7166-4
- https://ubuntu.com/security/notices/USN-7186-1
- https://ubuntu.com/security/notices/USN-7186-2
- https://ubuntu.com/security/notices/USN-7194-1
- 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-7383-1
- https://ubuntu.com/security/notices/USN-7383-2
- https://ubuntu.com/security/notices/USN-7384-1
- https://ubuntu.com/security/notices/USN-7384-2
- https://ubuntu.com/security/notices/USN-7385-1
- https://ubuntu.com/security/notices/USN-7386-1
- https://ubuntu.com/security/notices/USN-7403-1
- https://ubuntu.com/security/notices/USN-7451-1
- 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-2024-50041