dm ioctl: prevent potential spectre v1 gadget
In the Linux kernel, the following vulnerability has been resolved: dm ioctl: prevent potential spectre v1 gadget It appears like cmd could be a Spectre v1 gadget as it's supplied by a user and used as an array index. Prevent the contents of kernel memory from being leaked to userspace via speculative execution by using array_index_nospec.
02 / AFFECTED SOFTWARE
Affected packages
1893 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: dm ioctl: prevent potential spectre v1 gadget It appears like cmd could be a Spectre v1 gadget as it's supplied by a user and used as an array index. Prevent the contents of kernel memory from being leaked to userspace via speculative execution by using array_index_nospec.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/02cc46f397eb3691c56affbd5073e54f7a82ac32
- https://git.kernel.org/stable/c/0320bac5801b31407200227173205d017488f140
- https://git.kernel.org/stable/c/44e6cb3ab177faae840bb2c1ebda9a2539876184
- https://git.kernel.org/stable/c/58880025e3362024f6d8ea01cb0c7a5df6c84ba6
- https://git.kernel.org/stable/c/71c8df33fd777c7628f6fbc09b14e84806c55914
- https://git.kernel.org/stable/c/76c94651005f58885facf9c973007f5ea01ab01f
- https://git.kernel.org/stable/c/7ae2c5b89da3cfaf856df880af27d3bb32a74b3d
- https://git.kernel.org/stable/c/cd9c88da171a62c4b0f1c70e50c75845969fbc18
- https://git.kernel.org/stable/c/dd86064417de828ff2102ddc6049c829bf7585b4
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49122.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49122