CVE-2025-27465

MEDIUM EPSS 42.0%
Published Jul 16, 202511mo ago · Modified Jun 17, 20262w ago
4.3 CVSS 3.1
Medium
Find Similar
Published Jul 16, 2025 11mo ago
Last Modified Jun 17, 2026 2w ago

Description

Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.

CVSS Details

Base Score
4.3
Exploitability
2.8
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
42.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-755

Affected Products 1

VendorProductVersionRange
xenxen*≥4.9.0

References 3

  • openwall.com http://www.openwall.com/lists/oss-security/2025/07/01/1
    Mailing ListThird Party Advisory
  • xenbits.xen.org http://xenbits.xen.org/xsa/advisory-470.html
    PatchVendor Advisory
  • xenbits.xenproject.org https://xenbits.xenproject.org/xsa/advisory-470.html
    PatchVendor Advisory

Remediation