CVE-2024-36909 (GCVE-0-2024-36909)

Vulnerability from cvelistv5 – Published: 2024-05-30 15:29 – Updated: 2026-01-05 10:36
VLAI?
Title
Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d4dccf353db80e209f262e3973c834e6e48ba9a9 , < 2f622008bf784a9f5dd17baa19223cc2ac30a039 (git)
Affected: d4dccf353db80e209f262e3973c834e6e48ba9a9 , < 82f9e213b124a7d2bb5b16ea35d570260ef467e0 (git)
Affected: d4dccf353db80e209f262e3973c834e6e48ba9a9 , < a9212a4e2963a7fbe3864ba33dc551d4ad8d0abb (git)
Affected: d4dccf353db80e209f262e3973c834e6e48ba9a9 , < 30d18df6567be09c1433e81993e35e3da573ac48 (git)
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    Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.91 , ≤ 6.1.* (semver)
Unaffected: 6.6.31 , ≤ 6.6.* (semver)
Unaffected: 6.8.10 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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