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CVE-2026-72138: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    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.

    Засегнати продукти

    • Linux Linux: 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 52dc40ef0cfee6ae89b7524967e73f0ba37906d7; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 1dd9cb98fe228e017fff9efb33862ff38c741b65; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 6df926130aee6cab9b5d2e5b7862e49ccac348dc; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 311011f8cc206c5af2877b03e3f627ee1b8fe024; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 18a693733f7ad004e1ab0466693121ca70cd95dd; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 16d3ccdabb8dee9be2cdcd6d3f9a125572ec0454; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 6883269a323609f68f6faa903f8f8ff3d191cec8; 68b025c813c2eb41ff25628e3d4952d5185eb1a4 преди 45ca1afe2fd14c04e37227e79d3f8455831d8408
    • Linux Linux: 2.6.39; преди 2.6.39; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

    История

    • 15 август 2026 Публикувано

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    CVE-2026-72138: Linux | freedomonline.bg