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CVE-2026-99063: 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: dm ioctl: don't let data_start run past the buffer struct dm_ioctl has seven bytes of trailing padding, so the smallest buffer userspace is allowed to ask for, offsetof(struct dm_ioctl, data), is seven bytes shorter than sizeof(struct dm_ioctl). get_result_buffer() sets data_start to sizeof(struct dm_ioctl) without looking at how big the buffer actually is. Ask for the minimum and data_start ends up seven bytes past the end. Callers add it to data_size, and ctl_ioctl() copies that much back to userspace: BUG: KASAN: slab-out-of-bounds in _copy_to_user+0xad/0xd0 Read of size 312 at addr ffff8880169e4c00 by task repro-dm/140 ctl_ioctl+0x5e3/0xcb0 dm_ctl_ioctl+0x25/0x40 allocated 305-byte region [ffff8880169e4c00, ffff8880169e4d31) A DM_LIST_DEVICES with data_size set to 305 is enough to hit it, and the seven bytes that leak are whatever sat next to the allocation. Clamp data_start to the buffer size. Note that this is not a security bug because the out-of-bounds read can only be triggered by root.

    Засегнати продукти

    • Linux Linux: 76c072b48e39e9291fbf02d6c912cf27d65e093d преди aaa93e41ae308ad9ff9d9ba3296a0d0f4d45bad3; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди f171054f3c4cfc4dc0cb622ec5b15793e5f23029; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди afe80ec31464f4c54cc1bc658753bc14cb14bd6c; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди 98195e822343a656b92e235847ab3e72b1a3f920; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди e5c3f3d8935ecc64c962fb66e6a86dbf79218f61; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди 5680b6fb3054677d4ee65d3baba24b649f1b430e; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди 725b49c689bbb29ef740b0d6b5ea9390baa9a695; 76c072b48e39e9291fbf02d6c912cf27d65e093d преди 9b3fcf519d370df94a56f3b272d9eddffffa5be8
    • Linux Linux: 2.6.25; преди 2.6.25; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.113 до 6.12.*; 6.18.57 до 6.18.*; 7.2.11 до 7.2.*; от 7.3 нататък

    История

    • 23 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99063: Linux | freedomonline.bg