boxscore/security
CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2024-36909MEDIUM
Linux Linux — Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0024   15.3     —
AFFECTED
  Product  Versions                                    Fixed
  Linux    d4dccf353db80e209f262e3973c834e6e48ba9a9 –  —
  Linux    5.16 –                                      6.1.91
TIMELINE
  May 30  Reserved by Linux
  May 30  Published (CNA: Linux)
  Aug 4   RESCORED — CVE-2024-36909 (Linux). CVSS 9.3 → 5.5 (NVD).
CWE-401 · CNA: Linux · CVSS v3.1 · 4 references · NVD status: Modified

Description

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.

Lifecycle

Complete event history — 3 events, chronological
DateEventDetail
May 30, 2024ReservedReserved by Linux
May 30, 2024PublishedPublished (CNA: Linux)
August 4, 2026RESCOREDRESCORED — CVE-2024-36909 (Linux). CVSS 9.3 → 5.5 (NVD).

Affected

Affected products and packages — 2 rows
VendorProduct / PackageEcosystemVersion introducedFixed
LinuxLinuxd4dccf353db80e209f262e3973c834e6e48ba9a9
LinuxLinux5.166.1.91

Weaknesses

CWE-401

References (4)

Related

Authoritative record: CVE-2024-36909 at cve.org

Vendors: linux

Weaknesses: CWE-401

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-36909 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.