linux: A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active v...
CVE-2021-4095 is fixed in 15 products on 1 platform, first by DEBIAN-CVE-2021-4095, released March 10, 2022. It is not reported as exploited. Patch Radar priority: Routine.
A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-container · ol 8 | 0:5.15.0-0.30.19.el8 | ELSA-2022-9534 | Jun 30, 2022 |
| kernel-uek-container-debug · ol 8 | 0:5.15.0-0.30.19.el8 | ELSA-2022-9534 | Jun 30, 2022 |
| kernel-uek-core · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-debug · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-debug-core · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-debug-devel · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-debug-modules · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-debug-modules-extra · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-devel · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-doc · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-modules · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| kernel-uek-modules-extra · ol 8 | 0:5.15.0-0.30.19.el8uek | ELSA-2022-9533 | Jun 30, 2022 |
| linux · Debian 12.15 (bookworm) | 5.17.3-1 | DEBIAN-CVE-2021-4095 | Mar 10, 2022 |
| linux · Debian 13.5 (trixie) | 5.17.3-1 | DEBIAN-CVE-2021-4095 | Mar 10, 2022 |
| linux · Debian 14 | 5.17.3-1 | DEBIAN-CVE-2021-4095 | Mar 10, 2022 |
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