CVE-2024-36912
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.6 CRITICALCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.96% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1258
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81Patch
- https://git.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242caPatch
- https://git.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8Patch
- https://git.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99Patch
- https://git.kernel.org/stable/c/1999644d95194d4a58d3e80ad04ce19220a01a81Patch
- https://git.kernel.org/stable/c/211f514ebf1ef5de37b1cf6df9d28a56cfd242caPatch
- https://git.kernel.org/stable/c/8e62341f5c45b27519b7d193bcc32ada416ad9d8Patch
- https://git.kernel.org/stable/c/bfae56be077ba14311509e70706a13458f87ea99Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.