CVE-2026-72138
CVE CVE-2026-72138EUVD EUVD-2026-58896Published 2026-08-15T05:53:12.000ZLast changed 2026-08-17T05:08:56.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.1.5; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <18a693733f7ad004e1ab0466693121ca70cd95dd; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <45ca1afe2fd14c04e37227e79d3f8455831d8408; patch: 6.12.97; patch: 6.1.178; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <6df926130aee6cab9b5d2e5b7862e49ccac348dc; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <16d3ccdabb8dee9be2cdcd6d3f9a125572ec0454; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <1dd9cb98fe228e017fff9efb33862ff38c741b65; 2.6.39; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <6883269a323609f68f6faa903f8f8ff3d191cec8; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <311011f8cc206c5af2877b03e3f627ee1b8fe024; patch: 6.6.145; patch: 0; patch: 6.18.40; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 <52dc40ef0cfee6ae89b7524967e73f0ba37906d7; patch: 5.15.212; patch: 7.2; patch: 5.10.261
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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