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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-72138 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: fix error handling in ioctl When gntdev_ioctl_map_grant_ref() fails to copy the operation result back to userspace after successfully adding the mapping to the list, the error path returns -EFAULT without releasing the reference acquired by gntdev_alloc_map(). The mapping remains in priv->maps with a refcount of 1, causing a memory leak and a dangling list entry. Additionally, gntdev_add_map() may modify map->index to avoid overlap with existing mappings. Therefore, the index returned to userspace must be obtained after gntdev_add_map() completes. Fix this by holding the mutex across gntdev_add_map(), retrieving the correct index, and copy_to_user(). If copy_to_user() fails, remove the mapping from the list and release the reference while still holding the lock. Fix these issues by properly handling all error cases.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/16d3ccdabb8dee9be2cdcd6d3f9a125572ec0454 kernel.org
https://git.kernel.org/stable/c/18a693733f7ad004e1ab0466693121ca70cd95dd kernel.org
https://git.kernel.org/stable/c/1dd9cb98fe228e017fff9efb33862ff38c741b65 kernel.org
https://git.kernel.org/stable/c/311011f8cc206c5af2877b03e3f627ee1b8fe024 kernel.org
https://git.kernel.org/stable/c/45ca1afe2fd14c04e37227e79d3f8455831d8408 kernel.org
https://git.kernel.org/stable/c/52dc40ef0cfee6ae89b7524967e73f0ba37906d7 kernel.org
https://git.kernel.org/stable/c/6883269a323609f68f6faa903f8f8ff3d191cec8 kernel.org
https://git.kernel.org/stable/c/6df926130aee6cab9b5d2e5b7862e49ccac348dc kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-72138
NVD Published Date:
08/15/2026
NVD Last Modified:
08/15/2026
Source:
kernel.org