A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Secondary |
en
CWE-416
|
| [email protected] | Primary |
en
CWE-416
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4d200> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4d180> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4f180> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2d825ba80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4d2c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4c640> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3606a1b40> | Operating System |
| linux | linux_kernel | 6.4 | <built-in method update of dict object at 0x7fd36ad4c4c0> | Operating System |
| linux | linux_kernel | 6.4 | <built-in method update of dict object at 0x7fd369ad42c0> | Operating System |
| linux | linux_kernel | 6.4 | <built-in method update of dict object at 0x7fd36ad4df40> | Operating System |
| linux | linux_kernel | 6.4 | <built-in method update of dict object at 0x7fd3697d4040> | Operating System |
| linux | linux_kernel | 6.4 | <built-in method update of dict object at 0x7fd2d825af40> | Operating System |
| linux | linux_kernel | 6.4 | <built-in method update of dict object at 0x7fd3841f1000> | Operating System |
| debian | debian_linux | 10.0 | <built-in method update of dict object at 0x7fd368d80240> | Operating System |
| debian | debian_linux | 11.0 | <built-in method update of dict object at 0x7fd2d8259b40> | 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:6.4:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |