by Kastro
Paper/Archive/CVE-2024-36911

CVE-2024-36911

Linux Linux — hv_netvsc: Don't free decrypted memory

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 49.5.495 × 209.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In the Linux kernel, the following vulnerability has been resolved: hv_netvsc: Don't free decrypted memory 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 netvsc driver could free decrypted/shared pages if set_memory_decrypted() fails. Check the decrypted field in the gpadl to decide whether to free the memory.

Affected

ProductAffectedFixed inSource
Linuxd4dccf353db80e209f262e3973c834e6e48ba9a9 – < fb671512ffb26570c05ba3fbe20752e645809192fb671512ffb26570c05ba3fbe20752e645809192CNA
Linuxd4dccf353db80e209f262e3973c834e6e48ba9a9 – < a56fe611326332bf6b7126e5559590c57dcebad4a56fe611326332bf6b7126e5559590c57dcebad4CNA
Linuxd4dccf353db80e209f262e3973c834e6e48ba9a9 – < 4aaed9dbe8acd2b6114458f0498a617283d6275b4aaed9dbe8acd2b6114458f0498a617283d6275bCNA
Linuxd4dccf353db80e209f262e3973c834e6e48ba9a9 – < bbf9ac34677b57506a13682b31a2a718934c0e31bbf9ac34677b57506a13682b31a2a718934c0e31CNA
Linux5.16–CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgit.kernel.org/stable/c/fb671512ffb26570c05ba3fbe20752e645809192refgit.kernel.org/stable/c/a56fe611326332bf6b7126e5559590c57dcebad4refgit.kernel.org/stable/c/4aaed9dbe8acd2b6114458f0498a617283d6275brefgit.kernel.org/stable/c/bbf9ac34677b57506a13682b31a2a718934c0e31