CVE-2026-62437
x86: DMs may cause mem leak by IRQ binding
Description
When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.
INFO
Published Date :
Sept. 8, 2026, 1:17 p.m.
Last Modified :
Sept. 10, 2026, 7:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Ensure IRQ tracking structures are not re-established after guest termination.
- Correct the guest device model's binding of IRQs during termination.
- Verify all tracking structures are removed before guest termination completes.
- Apply relevant vendor patches or updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62437.
| URL | Resource |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-509.html | |
| http://www.openwall.com/lists/oss-security/2026/09/08/6 | |
| http://xenbits.xen.org/xsa/advisory-509.html |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62437 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62437
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62437 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62437 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 10, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Added CWE CWE-362 Added SSVC {'id': 'CVE-2026-62437', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-10T18:11:30.445915Z'} -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Sep. 08, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/09/08/6 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Sep. 08, 2026
Action Type Old Value New Value Added Reference http://xenbits.xen.org/xsa/advisory-509.html -
New CVE Received by [email protected]
Sep. 08, 2026
Action Type Old Value New Value Added Description When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/62xxx/CVE-2026-62437.json">CVE-2026-62437</a> Added Reference https://xenbits.xenproject.org/xsa/advisory-509.html