CVE-2024-36912 Affecting kernel-64kb-devel package, versions <6.4.0-150600.23.17.1
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Test your applications- Snyk ID SNYK-SLES156-KERNEL64KBDEVEL-7648290
- published 8 Aug 2024
- disclosed 7 Aug 2024
Introduced: 7 Aug 2024
CVE-2024-36912 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 kernel-64kb-devel to version 6.4.0-150600.23.17.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-64kb-devel package and not the kernel-64kb-devel package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
Drivers: hv: vmbus: Track decrypted status in vmbus_gpadl
In CoCo VMs it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues.
In order to make sure callers of vmbus_establish_gpadl() and vmbus_teardown_gpadl() don't return decrypted/shared pages to allocators, add a field in struct vmbus_gpadl to keep track of the decryption status of the buffers. This will allow the callers to know if they should free or leak the pages.
References
- https://www.suse.com/security/cve/CVE-2024-36912.html
- https://bugzilla.suse.com/1225752
- https://git.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81
- https://git.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242ca
- https://git.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8
- https://git.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99