In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: add mutex to guard hook reference counting As the synproxy infrastructure register netfilter hooks on-demand when a user adds the first iptables target or nftables expression, if done concurrently they can race each other. Introduce a mutex to serialize the refcount control blocks access from both frontends. While a per namespace mutex might be more efficient, it is not needed for target/expression like SYNPROXY.
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
NVD-CWE-noinfo
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23a5b314c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d24246dd100> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23ac6c2c40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23a59c1380> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23a5b31200> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23a5b31280> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7d23aec9b900> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7d23ac6c2bc0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7d23ac6c3840> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7d23a5b313c0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7d23aeca0a00> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7d23ad074bc0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7d23a591a840> | 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:7.1:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* |