Vulnerability in Linux
CVE-2024-36909
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted 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. The VMBus ring buffer code could free decrypted/shared pages if set_memory_decrypted() fails. Check the decrypted field in the struct vmbus_gpadl for the ring buffers to decide whether to free the memory.
EPSS: 0.002 (13.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Linux — versions d4dccf353db80e209f262e3973c834e6e48ba9a9, 5.16, 0
- Linux Linux_kernel — versions 6.9
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2024-36909?
- CVE-2024-36909 is a critical-severity vulnerability in Linux, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 9.3/10. Published 2024-05-30.
- How severe is CVE-2024-36909?
- Critical severity. CVSS v3 base score is 9.3 out of 10.
- Is CVE-2024-36909 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.