CVE-2025-8860
LOW EPSS 4.3%
Published Feb 18, 20264mo ago · Modified Jun 17, 20261w ago
3.3 CVSS 3.1
Published Feb 18, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
4.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-212
References 2
- access.redhat.com https://access.redhat.com/security/cve/CVE-2025-8860
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2387588
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.