linux: This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3
CVE-2021-34866 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-34866, released January 25, 2022. It is not reported as exploited. Patch Radar priority: High.
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.14-rc3. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs, which can result in a type confusion condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-14689.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.14.6-1 | DEBIAN-CVE-2021-34866 | Jan 25, 2022 |
| linux · Debian 13.5 (trixie) | 5.14.6-1 | DEBIAN-CVE-2021-34866 | Jan 25, 2022 |
| linux · Debian 14 | 5.14.6-1 | DEBIAN-CVE-2021-34866 | Jan 25, 2022 |
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