Overview
About vulnerability
A use-after-free vulnerability in the Linux kernel’s netfilter: nf_tables component can be exploited to achieve local privilege escalation.
The nft_setelem_catchall_deactivate() function checks whether the catch-all set element is active in the current generation instead of the next generation before freeing it, but only flags it inactive in the next generation, making it possible to free the element multiple times, leading to a double free vulnerability.
We recommend upgrading past commit b1db244ffd041a49ecc9618e8feb6b5c1afcdaa7.
Details
- Affected product:
- AlmaLinux 9.2 ESU , CentOS 6 ELS , CentOS 7 ELS , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 6 ELS , Oracle Linux 6 ELS , TuxCare 9.6 ESU
- Affected packages:
- kernel @ 2.6.32 (+8 more)
Fixes
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| AlmaLinux 9 | Released |
19 kernels
|
| Amazon Linux 2023 | Planned | — |
| Debian 12 | Planned | — |
| Oracle Linux 8 UEK 7 | Released |
27 kernels
|
| Oracle Linux 9 | Released |
25 kernels
|
| Oracle Linux 9 UEK 7 | Released |
27 kernels
|
| Proxmox VE 7 5.15 | Released |
43 kernels
|
| RHEL 9 | Released |
19 kernels
|
| Rocky Linux 9 | Released |
18 kernels
|
| Ubuntu 20.04 HWE AWS | Released |
34 kernels
|
| Ubuntu 20.04 HWE Azure | Released |
18 kernels
|
| Ubuntu 22.04 | Released |
47 kernels
|
| Ubuntu 22.04 AWS | Released |
41 kernels
|
| Ubuntu 22.04 Azure | Released |
38 kernels
|