In the Linux kernel, the following vulnerability has been resolved: net: sched: cls_api: fix tc_chain_fill_node to initialize tcm_info to zero to prevent an info-leak When building netlink messages, tc_chain_fill_node() never initializes the tcm_info field of struct tcmsg. Since the allocation is not zeroed, kernel heap memory is leaked to userspace through this 4-byte field. The fix simply zeroes tcm_info alongside the other fields that are already initialized.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-908
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcab462c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdd9a3a00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdd9a3e00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcab44ac0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcab44600> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcab45240> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bde4f2e80> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdd9a3240> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdd9a3380> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bcab45ac0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdd9a1cc0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdd9a3c40> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702ba6c52f00> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* |