Description
A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFI_VARS_REG_BUFFER_SIZE, the .write callback `uefi_vars_write` is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. When the guest later reads from register UEFI_VARS_REG_PIO_BUFFER_TRANSFER, the .read callback `uefi_vars_read` returns leftover metadata or other sensitive process memory from the previously allocated buffer, leading to an information disclosure vulnerability.
INFO
Published Date :
2026-02-18T20:49:06.186Z
Last Modified :
2026-02-19T14:35:51.033Z
Source :
fedora
AFFECTED PRODUCTS
The following products are affected by CVE-2025-8860 vulnerability.
| Vendors | Products |
|---|---|
| Redhat |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2025-8860.
